--- _id: '15002' abstract: - lang: eng text: "The lattice Schwinger model, the discrete version of QED in \r\n1\r\n+\r\n1\r\n dimensions, is a well-studied test bench for lattice gauge theories. Here, we study the fractal properties of this model. We reveal the self-similarity of the ground state, which allows us to develop a recurrent procedure for finding the ground-state wave functions and predicting ground-state energies. We present the results of recurrently calculating ground-state wave functions using the fractal Ansatz and automized software package for fractal image processing. In certain parameter regimes, just a few terms are enough for our recurrent procedure to predict ground-state energies close to the exact ones for several hundreds of sites. Our findings pave the way to understanding the complexity of calculating many-body wave functions in terms of their fractal properties as well as finding new links between condensed matter and high-energy lattice models." acknowledgement: "We thank A. Bargov, I. Khaymovich, and V. Tiunova for fruitful discussions and for useful comments. M. C. B. thanks S. Kühn for discussions about the phase structure of the model. A. K. F. thanks V. Gritsev and A. Garkun for insightful comments. E. V. P., E. S. T., and A. K. F. are\r\nsupported by the RSF Grant No. 20-42-05002 (studying the fractal Ansatz) and the Roadmap on Quantum Computing (Contract No. 868-1.3-15/15-2021, October 5, 2021; calculating on GS energies). A. K. F. thanks the Priority 2030 program at the NIST “MISIS” under the project No. K1-2022-027. M. C. B. was partly funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC-2111–390814868." article_number: '050401' article_processing_charge: No article_type: original author: - first_name: Elena full_name: Petrova, Elena id: 0ac84990-897b-11ed-a09c-f5abb56a4ede last_name: Petrova - first_name: Egor S. full_name: Tiunov, Egor S. last_name: Tiunov - first_name: Mari Carmen full_name: Bañuls, Mari Carmen last_name: Bañuls - first_name: Aleksey K. full_name: Fedorov, Aleksey K. last_name: Fedorov citation: ama: Petrova E, Tiunov ES, Bañuls MC, Fedorov AK. Fractal states of the Schwinger model. Physical Review Letters. 2024;132(5). doi:10.1103/PhysRevLett.132.050401 apa: Petrova, E., Tiunov, E. S., Bañuls, M. C., & Fedorov, A. K. (2024). Fractal states of the Schwinger model. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.132.050401 chicago: Petrova, Elena, Egor S. Tiunov, Mari Carmen Bañuls, and Aleksey K. Fedorov. “Fractal States of the Schwinger Model.” Physical Review Letters. American Physical Society, 2024. https://doi.org/10.1103/PhysRevLett.132.050401. ieee: E. Petrova, E. S. Tiunov, M. C. Bañuls, and A. K. Fedorov, “Fractal states of the Schwinger model,” Physical Review Letters, vol. 132, no. 5. American Physical Society, 2024. ista: Petrova E, Tiunov ES, Bañuls MC, Fedorov AK. 2024. Fractal states of the Schwinger model. Physical Review Letters. 132(5), 050401. mla: Petrova, Elena, et al. “Fractal States of the Schwinger Model.” Physical Review Letters, vol. 132, no. 5, 050401, American Physical Society, 2024, doi:10.1103/PhysRevLett.132.050401. short: E. Petrova, E.S. Tiunov, M.C. Bañuls, A.K. Fedorov, Physical Review Letters 132 (2024). date_created: 2024-02-18T23:01:00Z date_published: 2024-01-30T00:00:00Z date_updated: 2024-02-26T08:03:31Z day: '30' department: - _id: MaSe doi: 10.1103/PhysRevLett.132.050401 external_id: arxiv: - '2201.10220' intvolume: ' 132' issue: '5' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2201.10220 month: '01' oa: 1 oa_version: Preprint publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Fractal states of the Schwinger model type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 132 year: '2024' ... --- _id: '15122' abstract: - lang: eng text: Quantum computers are increasing in size and quality but are still very noisy. Error mitigation extends the size of the quantum circuits that noisy devices can meaningfully execute. However, state-of-the-art error mitigation methods are hard to implement and the limited qubit connectivity in superconducting qubit devices restricts most applications to the hardware's native topology. Here we show a quantum approximate optimization algorithm (QAOA) on nonplanar random regular graphs with up to 40 nodes enabled by a machine learning-based error mitigation. We use a swap network with careful decision-variable-to-qubit mapping and a feed-forward neural network to optimize a depth-two QAOA on up to 40 qubits. We observe a meaningful parameter optimization for the largest graph which requires running quantum circuits with 958 two-qubit gates. Our paper emphasizes the need to mitigate samples, and not only expectation values, in quantum approximate optimization. These results are a step towards executing quantum approximate optimization at a scale that is not classically simulable. Reaching such system sizes is key to properly understanding the true potential of heuristic algorithms like QAOA. acknowledgement: S.H.S. acknowledges support from the IBM Ph.D. fellowship 2022 in quantum computing. The authors also thank M. Serbyn, R. Kueng, R. A. Medina, and S. Woerner for fruitful discussions. article_number: '013223' article_processing_charge: Yes article_type: original author: - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack orcid: 0000-0001-5400-8508 - first_name: Daniel J. full_name: Egger, Daniel J. last_name: Egger citation: ama: Sack S, Egger DJ. Large-scale quantum approximate optimization on nonplanar graphs with machine learning noise mitigation. Physical Review Research. 2024;6(1). doi:10.1103/PhysRevResearch.6.013223 apa: Sack, S., & Egger, D. J. (2024). Large-scale quantum approximate optimization on nonplanar graphs with machine learning noise mitigation. Physical Review Research. American Physical Society. https://doi.org/10.1103/PhysRevResearch.6.013223 chicago: Sack, Stefan, and Daniel J. Egger. “Large-Scale Quantum Approximate Optimization on Nonplanar Graphs with Machine Learning Noise Mitigation.” Physical Review Research. American Physical Society, 2024. https://doi.org/10.1103/PhysRevResearch.6.013223. ieee: S. Sack and D. J. Egger, “Large-scale quantum approximate optimization on nonplanar graphs with machine learning noise mitigation,” Physical Review Research, vol. 6, no. 1. American Physical Society, 2024. ista: Sack S, Egger DJ. 2024. Large-scale quantum approximate optimization on nonplanar graphs with machine learning noise mitigation. Physical Review Research. 6(1), 013223. mla: Sack, Stefan, and Daniel J. Egger. “Large-Scale Quantum Approximate Optimization on Nonplanar Graphs with Machine Learning Noise Mitigation.” Physical Review Research, vol. 6, no. 1, 013223, American Physical Society, 2024, doi:10.1103/PhysRevResearch.6.013223. short: S. Sack, D.J. Egger, Physical Review Research 6 (2024). date_created: 2024-03-17T23:00:59Z date_published: 2024-03-01T00:00:00Z date_updated: 2024-03-19T07:24:03Z day: '01' ddc: - '530' department: - _id: MaSe doi: 10.1103/PhysRevResearch.6.013223 external_id: arxiv: - '2307.14427' file: - access_level: open_access checksum: 274c9f1b15b3547a10a03f39e4ccc582 content_type: application/pdf creator: dernst date_created: 2024-03-19T07:16:38Z date_updated: 2024-03-19T07:16:38Z file_id: '15123' file_name: 2024_PhysicalReviewResearch_Sack.pdf file_size: 2777593 relation: main_file success: 1 file_date_updated: 2024-03-19T07:16:38Z has_accepted_license: '1' intvolume: ' 6' issue: '1' language: - iso: eng license: https://creativecommons.org/licenses/by/4.0/ month: '03' oa: 1 oa_version: Published Version project: - _id: bd660c93-d553-11ed-ba76-fb0fb6f49c0d name: Quantum_Quantum Circuits and Software_Variational quantum algorithms on NISQ devices publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Large-scale quantum approximate optimization on nonplanar graphs with machine learning noise mitigation tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 6 year: '2024' ... --- _id: '13277' abstract: - lang: eng text: Recent experimental advances have inspired the development of theoretical tools to describe the non-equilibrium dynamics of quantum systems. Among them an exact representation of quantum spin systems in terms of classical stochastic processes has been proposed. Here we provide first steps towards the extension of this stochastic approach to bosonic systems by considering the one-dimensional quantum quartic oscillator. We show how to exactly parameterize the time evolution of this prototypical model via the dynamics of a set of classical variables. We interpret these variables as stochastic processes, which allows us to propose a novel way to numerically simulate the time evolution of the system. We benchmark our findings by considering analytically solvable limits and providing alternative derivations of known results. acknowledgement: 'S. De Nicola acknowledges funding from the Institute of Science and Technology Austria (ISTA), and from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754411. S. De Nicola also acknowledges funding from the EPSRC Center for Doctoral Training in Cross-Disciplinary Approaches to NonEquilibrium Systems (CANES) under Grant EP/L015854/1. ' article_number: '029' article_processing_charge: No article_type: original author: - first_name: Gennaro full_name: Tucci, Gennaro last_name: Tucci - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 - first_name: Sascha full_name: Wald, Sascha last_name: Wald - first_name: Andrea full_name: Gambassi, Andrea last_name: Gambassi citation: ama: Tucci G, De Nicola S, Wald S, Gambassi A. Stochastic representation of the quantum quartic oscillator. SciPost Physics Core. 2023;6(2). doi:10.21468/scipostphyscore.6.2.029 apa: Tucci, G., De Nicola, S., Wald, S., & Gambassi, A. (2023). Stochastic representation of the quantum quartic oscillator. SciPost Physics Core. SciPost Foundation. https://doi.org/10.21468/scipostphyscore.6.2.029 chicago: Tucci, Gennaro, Stefano De Nicola, Sascha Wald, and Andrea Gambassi. “Stochastic Representation of the Quantum Quartic Oscillator.” SciPost Physics Core. SciPost Foundation, 2023. https://doi.org/10.21468/scipostphyscore.6.2.029. ieee: G. Tucci, S. De Nicola, S. Wald, and A. Gambassi, “Stochastic representation of the quantum quartic oscillator,” SciPost Physics Core, vol. 6, no. 2. SciPost Foundation, 2023. ista: Tucci G, De Nicola S, Wald S, Gambassi A. 2023. Stochastic representation of the quantum quartic oscillator. SciPost Physics Core. 6(2), 029. mla: Tucci, Gennaro, et al. “Stochastic Representation of the Quantum Quartic Oscillator.” SciPost Physics Core, vol. 6, no. 2, 029, SciPost Foundation, 2023, doi:10.21468/scipostphyscore.6.2.029. short: G. Tucci, S. De Nicola, S. Wald, A. Gambassi, SciPost Physics Core 6 (2023). date_created: 2023-07-24T10:47:46Z date_published: 2023-04-14T00:00:00Z date_updated: 2023-07-31T09:03:28Z day: '14' ddc: - '530' department: - _id: MaSe doi: 10.21468/scipostphyscore.6.2.029 ec_funded: 1 external_id: arxiv: - '2211.01923' file: - access_level: open_access checksum: b472bc82108747eda5d52adf9e2ac7f3 content_type: application/pdf creator: dernst date_created: 2023-07-31T09:02:27Z date_updated: 2023-07-31T09:02:27Z file_id: '13329' file_name: 2023_SciPostPhysCore_Tucci.pdf file_size: 523236 relation: main_file success: 1 file_date_updated: 2023-07-31T09:02:27Z has_accepted_license: '1' intvolume: ' 6' issue: '2' keyword: - Statistical and Nonlinear Physics - Atomic and Molecular Physics - and Optics - Nuclear and High Energy Physics - Condensed Matter Physics language: - iso: eng month: '04' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: SciPost Physics Core publication_identifier: issn: - 2666-9366 publication_status: published publisher: SciPost Foundation quality_controlled: '1' status: public title: Stochastic representation of the quantum quartic oscillator tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 6 year: '2023' ... --- _id: '12790' abstract: - lang: eng text: Motivated by the recent discoveries of superconductivity in bilayer and trilayer graphene, we theoretically investigate superconductivity and other interaction-driven phases in multilayer graphene stacks. To this end, we study the density of states of multilayer graphene with up to four layers at the single-particle band structure level in the presence of a transverse electric field. Among the considered structures, tetralayer graphene with rhombohedral (ABCA) stacking reaches the highest density of states. We study the phases that can arise in ABCA graphene by tuning the carrier density and transverse electric field. For a broad region of the tuning parameters, the presence of strong Coulomb repulsion leads to a spontaneous spin and valley symmetry breaking via Stoner transitions. Using a model that incorporates the spontaneous spin and valley polarization, we explore the Kohn-Luttinger mechanism for superconductivity driven by repulsive Coulomb interactions. We find that the strongest superconducting instability is in the p-wave channel, and occurs in proximity to the onset of Stoner transitions. Interestingly, we find a range of densities and transverse electric fields where superconductivity develops out of a strongly corrugated, singly connected Fermi surface in each valley, leading to a topologically nontrivial chiral p+ip superconducting state with an even number of copropagating chiral Majorana edge modes. Our work establishes ABCA-stacked tetralayer graphene as a promising platform for observing strongly correlated physics and topological superconductivity. acknowledgement: E.B. and T.H. were supported by the European Research Council (ERC) under grant HQMAT (Grant Agreement No. 817799), by the Israel-USA Binational Science Foundation (BSF), and by a Research grant from Irving and Cherna Moskowitz. article_number: '104502' article_processing_charge: No article_type: original author: - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Tobias full_name: Holder, Tobias last_name: Holder - first_name: Erez full_name: Berg, Erez last_name: Berg - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Ghazaryan A, Holder T, Berg E, Serbyn M. Multilayer graphenes as a platform for interaction-driven physics and topological superconductivity. Physical Review B. 2023;107(10). doi:10.1103/PhysRevB.107.104502 apa: Ghazaryan, A., Holder, T., Berg, E., & Serbyn, M. (2023). Multilayer graphenes as a platform for interaction-driven physics and topological superconductivity. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.107.104502 chicago: Ghazaryan, Areg, Tobias Holder, Erez Berg, and Maksym Serbyn. “Multilayer Graphenes as a Platform for Interaction-Driven Physics and Topological Superconductivity.” Physical Review B. American Physical Society, 2023. https://doi.org/10.1103/PhysRevB.107.104502. ieee: A. Ghazaryan, T. Holder, E. Berg, and M. Serbyn, “Multilayer graphenes as a platform for interaction-driven physics and topological superconductivity,” Physical Review B, vol. 107, no. 10. American Physical Society, 2023. ista: Ghazaryan A, Holder T, Berg E, Serbyn M. 2023. Multilayer graphenes as a platform for interaction-driven physics and topological superconductivity. Physical Review B. 107(10), 104502. mla: Ghazaryan, Areg, et al. “Multilayer Graphenes as a Platform for Interaction-Driven Physics and Topological Superconductivity.” Physical Review B, vol. 107, no. 10, 104502, American Physical Society, 2023, doi:10.1103/PhysRevB.107.104502. short: A. Ghazaryan, T. Holder, E. Berg, M. Serbyn, Physical Review B 107 (2023). date_created: 2023-04-02T22:01:10Z date_published: 2023-03-01T00:00:00Z date_updated: 2023-08-01T13:59:29Z day: '01' department: - _id: MaSe - _id: MiLe doi: 10.1103/PhysRevB.107.104502 external_id: arxiv: - '2211.02492' isi: - '000945526400003' intvolume: ' 107' isi: 1 issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2211.02492 month: '03' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: link: - description: News on the ISTA website relation: press_release url: https://ista.ac.at/en/news/reaching-superconductivity-layer-by-layer/ scopus_import: '1' status: public title: Multilayer graphenes as a platform for interaction-driven physics and topological superconductivity type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 107 year: '2023' ... --- _id: '12839' abstract: - lang: eng text: Universal nonequilibrium properties of isolated quantum systems are typically probed by studying transport of conserved quantities, such as charge or spin, while transport of energy has received considerably less attention. Here, we study infinite-temperature energy transport in the kinetically constrained PXP model describing Rydberg atom quantum simulators. Our state-of-the-art numerical simulations, including exact diagonalization and time-evolving block decimation methods, reveal the existence of two distinct transport regimes. At moderate times, the energy-energy correlation function displays periodic oscillations due to families of eigenstates forming different su(2) representations hidden within the spectrum. These families of eigenstates generalize the quantum many-body scarred states found in previous works and leave an imprint on the infinite-temperature energy transport. At later times, we observe a long-lived superdiffusive transport regime that we attribute to the proximity of a nearby integrable point. While generic strong deformations of the PXP model indeed restore diffusive transport, adding a strong chemical potential intriguingly gives rise to a well-converged superdiffusive exponent z≈3/2. Our results suggest constrained models to be potential hosts of novel transport regimes and call for developing an analytic understanding of their energy transport. acknowledgement: "We would like to thank Alexios Michailidis, Sarang Gopalakrishnan, and Achilleas Lazarides for useful comments. M. L. and M. S. acknowledge support by the European Research Council under the European Union’s Horizon 2020 research and innovation program (Grant\r\nAgreement No. 850899). J.-Y. D. and Z. P. acknowledge support by EPSRC Grant No. EP/R513258/1 and the Leverhulme Trust Research Leadership Grant No. RL2019-015. Statement of compliance with EPSRC policy framework on research data: This publication is theoretical work that does not require supporting research data. M. S., M. L., and Z. P. acknowledge support by the Erwin Schrödinger International Institute for Mathematics and\r\nPhysics. M. L. and M. S. acknowledge PRACE for awarding us access to Joliot-Curie at GENCI@CEA, France, where the TEBD simulations were performed. The TEBD\r\nsimulations were performed using the ITENSOR library [54]." article_number: '011033' article_processing_charge: No article_type: original author: - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina - first_name: Jean Yves full_name: Desaules, Jean Yves last_name: Desaules - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić citation: ama: Ljubotina M, Desaules JY, Serbyn M, Papić Z. Superdiffusive energy transport in kinetically constrained models. Physical Review X. 2023;13(1). doi:10.1103/PhysRevX.13.011033 apa: Ljubotina, M., Desaules, J. Y., Serbyn, M., & Papić, Z. (2023). Superdiffusive energy transport in kinetically constrained models. Physical Review X. American Physical Society. https://doi.org/10.1103/PhysRevX.13.011033 chicago: Ljubotina, Marko, Jean Yves Desaules, Maksym Serbyn, and Zlatko Papić. “Superdiffusive Energy Transport in Kinetically Constrained Models.” Physical Review X. American Physical Society, 2023. https://doi.org/10.1103/PhysRevX.13.011033. ieee: M. Ljubotina, J. Y. Desaules, M. Serbyn, and Z. Papić, “Superdiffusive energy transport in kinetically constrained models,” Physical Review X, vol. 13, no. 1. American Physical Society, 2023. ista: Ljubotina M, Desaules JY, Serbyn M, Papić Z. 2023. Superdiffusive energy transport in kinetically constrained models. Physical Review X. 13(1), 011033. mla: Ljubotina, Marko, et al. “Superdiffusive Energy Transport in Kinetically Constrained Models.” Physical Review X, vol. 13, no. 1, 011033, American Physical Society, 2023, doi:10.1103/PhysRevX.13.011033. short: M. Ljubotina, J.Y. Desaules, M. Serbyn, Z. Papić, Physical Review X 13 (2023). date_created: 2023-04-16T22:01:09Z date_published: 2023-03-07T00:00:00Z date_updated: 2023-08-01T14:11:28Z day: '07' ddc: - '530' department: - _id: MaSe doi: 10.1103/PhysRevX.13.011033 ec_funded: 1 external_id: isi: - '000957625700001' file: - access_level: open_access checksum: ee060cea609af79bba7af74b1ce28078 content_type: application/pdf creator: dernst date_created: 2023-04-17T08:36:53Z date_updated: 2023-04-17T08:36:53Z file_id: '12845' file_name: 2023_PhysReviewX_Ljubotina.pdf file_size: 1958523 relation: main_file success: 1 file_date_updated: 2023-04-17T08:36:53Z has_accepted_license: '1' intvolume: ' 13' isi: 1 issue: '1' language: - iso: eng month: '03' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review X publication_identifier: eissn: - 2160-3308 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Superdiffusive energy transport in kinetically constrained models tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 13 year: '2023' ... --- _id: '13963' abstract: - lang: eng text: The many-body localization (MBL) proximity effect is an intriguing phenomenon where a thermal bath localizes due to the interaction with a disordered system. The interplay of thermal and nonergodic behavior in these systems gives rise to a rich phase diagram, whose exploration is an active field of research. In this paper, we study a bosonic Hubbard model featuring two particle species representing the bath and the disordered system. Using state-of-the-art numerical techniques, we investigate the dynamics of the model in different regimes, based on which we obtain a tentative phase diagram as a function of coupling strength and bath size. When the bath is composed of a single particle, we observe clear signatures of a transition from an MBL proximity effect to a delocalized phase. Increasing the bath size, however, its thermalizing effect becomes stronger and eventually the whole system delocalizes in the range of moderate interaction strengths studied. In this regime, we characterize particle transport, revealing diffusive behavior of the originally localized bosons. acknowledgement: "We thank A. A. Michailidis and A. Mirlin for insightful discussions. P.B., M.L., and M.S. acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899). D.A. was\r\nsupported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 864597) and by the Swiss National Science Foundation. P.B., M.L., and M.S. acknowledge PRACE for awarding us access to Joliot-Curie at GENCI@CEA, France, where the TEBD simulations were performed. The TEBD simulations were performed using the ITensor library [60]." article_number: '054201' article_processing_charge: Yes (in subscription journal) article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Ljubotina M, Abanin DA, Serbyn M. Many-body localization proximity effect in a two-species bosonic Hubbard model. Physical Review B. 2023;108(5). doi:10.1103/physrevb.108.054201 apa: Brighi, P., Ljubotina, M., Abanin, D. A., & Serbyn, M. (2023). Many-body localization proximity effect in a two-species bosonic Hubbard model. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.108.054201 chicago: Brighi, Pietro, Marko Ljubotina, Dmitry A. Abanin, and Maksym Serbyn. “Many-Body Localization Proximity Effect in a Two-Species Bosonic Hubbard Model.” Physical Review B. American Physical Society, 2023. https://doi.org/10.1103/physrevb.108.054201. ieee: P. Brighi, M. Ljubotina, D. A. Abanin, and M. Serbyn, “Many-body localization proximity effect in a two-species bosonic Hubbard model,” Physical Review B, vol. 108, no. 5. American Physical Society, 2023. ista: Brighi P, Ljubotina M, Abanin DA, Serbyn M. 2023. Many-body localization proximity effect in a two-species bosonic Hubbard model. Physical Review B. 108(5), 054201. mla: Brighi, Pietro, et al. “Many-Body Localization Proximity Effect in a Two-Species Bosonic Hubbard Model.” Physical Review B, vol. 108, no. 5, 054201, American Physical Society, 2023, doi:10.1103/physrevb.108.054201. short: P. Brighi, M. Ljubotina, D.A. Abanin, M. Serbyn, Physical Review B 108 (2023). date_created: 2023-08-05T18:25:22Z date_published: 2023-08-01T00:00:00Z date_updated: 2023-08-07T09:51:39Z day: '01' ddc: - '530' department: - _id: MaSe doi: 10.1103/physrevb.108.054201 ec_funded: 1 external_id: arxiv: - '2303.16876' file: - access_level: open_access checksum: f763000339b5fd543c14377109920690 content_type: application/pdf creator: dernst date_created: 2023-08-07T09:48:08Z date_updated: 2023-08-07T09:48:08Z file_id: '13981' file_name: 2023_PhysRevB_Brighi.pdf file_size: 3051398 relation: main_file success: 1 file_date_updated: 2023-08-07T09:48:08Z has_accepted_license: '1' intvolume: ' 108' issue: '5' language: - iso: eng month: '08' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Many-body localization proximity effect in a two-species bosonic Hubbard model tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 108 year: '2023' ... --- _id: '14320' abstract: - lang: eng text: The development of two-dimensional materials has resulted in a diverse range of novel, high-quality compounds with increasing complexity. A key requirement for a comprehensive quantitative theory is the accurate determination of these materials' band structure parameters. However, this task is challenging due to the intricate band structures and the indirect nature of experimental probes. In this work, we introduce a general framework to derive band structure parameters from experimental data using deep neural networks. We applied our method to the penetration field capacitance measurement of trilayer graphene, an effective probe of its density of states. First, we demonstrate that a trained deep network gives accurate predictions for the penetration field capacitance as a function of tight-binding parameters. Next, we use the fast and accurate predictions from the trained network to automatically determine tight-binding parameters directly from experimental data, with extracted parameters being in a good agreement with values in the literature. We conclude by discussing potential applications of our method to other materials and experimental techniques beyond penetration field capacitance. acknowledgement: A.F.Y. acknowledges primary support from the Department of Energy under award DE-SC0020043, and additional support from the Gordon and Betty Moore Foundation under award GBMF9471 for group operations. article_number: '125411' article_processing_charge: No article_type: original author: - first_name: Paul M full_name: Henderson, Paul M id: 13C09E74-18D9-11E9-8878-32CFE5697425 last_name: Henderson orcid: 0000-0002-5198-7445 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Alexander A. full_name: Zibrov, Alexander A. last_name: Zibrov - first_name: Andrea F. full_name: Young, Andrea F. last_name: Young - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: 'Henderson PM, Ghazaryan A, Zibrov AA, Young AF, Serbyn M. Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene. Physical Review B. 2023;108(12). doi:10.1103/physrevb.108.125411' apa: 'Henderson, P. M., Ghazaryan, A., Zibrov, A. A., Young, A. F., & Serbyn, M. (2023). Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.108.125411' chicago: 'Henderson, Paul M, Areg Ghazaryan, Alexander A. Zibrov, Andrea F. Young, and Maksym Serbyn. “Deep Learning Extraction of Band Structure Parameters from Density of States: A Case Study on Trilayer Graphene.” Physical Review B. American Physical Society, 2023. https://doi.org/10.1103/physrevb.108.125411.' ieee: 'P. M. Henderson, A. Ghazaryan, A. A. Zibrov, A. F. Young, and M. Serbyn, “Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene,” Physical Review B, vol. 108, no. 12. American Physical Society, 2023.' ista: 'Henderson PM, Ghazaryan A, Zibrov AA, Young AF, Serbyn M. 2023. Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene. Physical Review B. 108(12), 125411.' mla: 'Henderson, Paul M., et al. “Deep Learning Extraction of Band Structure Parameters from Density of States: A Case Study on Trilayer Graphene.” Physical Review B, vol. 108, no. 12, 125411, American Physical Society, 2023, doi:10.1103/physrevb.108.125411.' short: P.M. Henderson, A. Ghazaryan, A.A. Zibrov, A.F. Young, M. Serbyn, Physical Review B 108 (2023). date_created: 2023-09-12T07:12:12Z date_published: 2023-09-15T00:00:00Z date_updated: 2023-09-20T09:38:24Z day: '15' department: - _id: MaSe - _id: ChLa - _id: MiLe doi: 10.1103/physrevb.108.125411 external_id: arxiv: - '2210.06310' intvolume: ' 108' issue: '12' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2210.06310 month: '09' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: 'Deep learning extraction of band structure parameters from density of states: A case study on trilayer graphene' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 108 year: '2023' ... --- _id: '12732' abstract: - lang: eng text: "Nonergodic systems, whose out-of-equilibrium dynamics fail to thermalize, provide a fascinating research direction both for fundamental reasons and for application in state of the art quantum devices.\r\nGoing beyond the description of statistical mechanics, ergodicity breaking yields a new paradigm in quantum many-body physics, introducing novel phases of matter with no counterpart at equilibrium.\r\nIn this Thesis, we address different open questions in the field, focusing on disorder-induced many-body localization (MBL) and on weak ergodicity breaking in kinetically constrained models.\r\nIn particular, we contribute to the debate about transport in kinetically constrained models, studying the effect of $U(1)$ conservation and inversion-symmetry breaking in a family of quantum East models.\r\nUsing tensor network techniques, we analyze the dynamics of large MBL systems beyond the limit of exact numerical methods.\r\nIn this setting, we approach the debated topic of the coexistence of localized and thermal eigenstates separated by energy thresholds known as many-body mobility edges.\r\nInspired by recent experiments, our work further investigates the localization of a small bath induced by the coupling to a large localized chain, the so-called MBL proximity effect.\r\n\r\nIn the first Chapter, we introduce a family of particle-conserving kinetically constrained models, inspired by the quantum East model.\r\nThe system we study features strong inversion-symmetry breaking, due to the nature of the correlated hopping.\r\nWe show that these models host so-called quantum Hilbert space fragmentation, consisting of disconnected subsectors in an entangled basis, and further provide an analytical description of this phenomenon.\r\nWe further probe its effect on dynamics of simple product states, showing revivals in fidelity and local observalbes.\r\nThe study of dynamics within the largest subsector reveals an anomalous transient superdiffusive behavior crossing over to slow logarithmic dynamics at later times.\r\nThis work suggests that particle conserving constrained models with inversion-symmetry breaking realize new universality classes of dynamics and invite their further theoretical and experimental studies.\r\n\r\nNext, we use kinetic constraints and disorder to design a model with many-body mobility edges in particle density.\r\nThis feature allows to study the dynamics of localized and thermal states in large systems beyond the limitations of previous studies.\r\nThe time-evolution shows typical signatures of localization at small densities, replaced by thermal behavior at larger densities.\r\nOur results provide evidence in favor of the stability of many-body mobility edges, which was recently challenged by a theoretical argument.\r\nTo support our findings, we probe the mechanism proposed as a cause of delocalization in many-body localized systems with mobility edges suggesting its ineffectiveness in the model studied.\r\n\r\nIn the last Chapter of this Thesis, we address the topic of many-body localization proximity effect.\r\nWe study a model inspired by recent experiments, featuring Anderson localized coupled to a small bath of free hard-core bosons.\r\nThe interaction among the two particle species results in non-trivial dynamics, which we probe using tensor network techniques.\r\nOur simulations show convincing evidence of many-body localization proximity effect when the bath is composed by a single free particle and interactions are strong.\r\nWe furthter observe an anomalous entanglement dynamics, which we explain through a phenomenological theory.\r\nFinally, we extract highly excited eigenstates of large systems, providing supplementary evidence in favor of our findings." acknowledged_ssus: - _id: ScienComp alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 citation: ama: Brighi P. Ergodicity breaking in disordered and kinetically constrained quantum many-body systems. 2023. doi:10.15479/at:ista:12732 apa: Brighi, P. (2023). Ergodicity breaking in disordered and kinetically constrained quantum many-body systems. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:12732 chicago: Brighi, Pietro. “Ergodicity Breaking in Disordered and Kinetically Constrained Quantum Many-Body Systems.” Institute of Science and Technology Austria, 2023. https://doi.org/10.15479/at:ista:12732. ieee: P. Brighi, “Ergodicity breaking in disordered and kinetically constrained quantum many-body systems,” Institute of Science and Technology Austria, 2023. ista: Brighi P. 2023. Ergodicity breaking in disordered and kinetically constrained quantum many-body systems. Institute of Science and Technology Austria. mla: Brighi, Pietro. Ergodicity Breaking in Disordered and Kinetically Constrained Quantum Many-Body Systems. Institute of Science and Technology Austria, 2023, doi:10.15479/at:ista:12732. short: P. Brighi, Ergodicity Breaking in Disordered and Kinetically Constrained Quantum Many-Body Systems, Institute of Science and Technology Austria, 2023. date_created: 2023-03-17T13:30:48Z date_published: 2023-03-21T00:00:00Z date_updated: 2023-09-20T10:44:12Z day: '21' ddc: - '530' degree_awarded: PhD department: - _id: GradSch - _id: MaSe doi: 10.15479/at:ista:12732 ec_funded: 1 file: - access_level: closed checksum: 5d2de651ef9449c1b8dc27148ca74777 content_type: application/zip creator: pbrighi date_created: 2023-03-23T16:42:56Z date_updated: 2023-03-23T16:42:56Z file_id: '12753' file_name: Thesis_sub_PBrighi.zip file_size: 42167561 relation: source_file - access_level: open_access checksum: 7caa153d4a5b0873a79358787d2dfe1e content_type: application/pdf creator: pbrighi date_created: 2023-03-23T16:43:14Z date_updated: 2023-03-23T16:43:14Z file_id: '12754' file_name: Thesis_PBrighi.pdf file_size: 13977000 relation: main_file success: 1 file_date_updated: 2023-03-23T16:43:14Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-sa/4.0/ month: '03' oa: 1 oa_version: None page: '158' project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '11470' relation: part_of_dissertation status: public - id: '8308' relation: part_of_dissertation status: public - id: '11469' relation: part_of_dissertation status: public - id: '12750' relation: part_of_dissertation status: public status: public supervisor: - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 title: Ergodicity breaking in disordered and kinetically constrained quantum many-body systems tmp: image: /images/cc_by_nc_sa.png legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) short: CC BY-NC-SA (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2023' ... --- _id: '14334' abstract: - lang: eng text: Quantum kinetically constrained models have recently attracted significant attention due to their anomalous dynamics and thermalization. In this work, we introduce a hitherto unexplored family of kinetically constrained models featuring conserved particle number and strong inversion-symmetry breaking due to facilitated hopping. We demonstrate that these models provide a generic example of so-called quantum Hilbert space fragmentation, that is manifested in disconnected sectors in the Hilbert space that are not apparent in the computational basis. Quantum Hilbert space fragmentation leads to an exponential in system size number of eigenstates with exactly zero entanglement entropy across several bipartite cuts. These eigenstates can be probed dynamically using quenches from simple initial product states. In addition, we study the particle spreading under unitary dynamics launched from the domain wall state, and find faster than diffusive dynamics at high particle densities, that crosses over into logarithmically slow relaxation at smaller densities. Using a classically simulable cellular automaton, we reproduce the logarithmic dynamics observed in the quantum case. Our work suggests that particle conserving constrained models with inversion symmetry breaking realize so far unexplored dynamical behavior and invite their further theoretical and experimental studies. acknowledgement: "We would like to thank Raimel A. Medina, Hansveer Singh, and Dmitry Abanin for useful\r\ndiscussions.The authors acknowledge support by the European Research Council\r\n(ERC) under the European Union’s Horizon 2020 research and innovation program (Grant\r\nAgreement No. 850899). We acknowledge support by the Erwin Schrödinger International\r\nInstitute for Mathematics and Physics (ESI)." article_number: '093' article_processing_charge: No article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina orcid: 0000-0003-0038-7068 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Ljubotina M, Serbyn M. Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. SciPost Physics. 2023;15(3). doi:10.21468/scipostphys.15.3.093 apa: Brighi, P., Ljubotina, M., & Serbyn, M. (2023). Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. SciPost Physics. SciPost Foundation. https://doi.org/10.21468/scipostphys.15.3.093 chicago: Brighi, Pietro, Marko Ljubotina, and Maksym Serbyn. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” SciPost Physics. SciPost Foundation, 2023. https://doi.org/10.21468/scipostphys.15.3.093. ieee: P. Brighi, M. Ljubotina, and M. Serbyn, “Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models,” SciPost Physics, vol. 15, no. 3. SciPost Foundation, 2023. ista: Brighi P, Ljubotina M, Serbyn M. 2023. Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. SciPost Physics. 15(3), 093. mla: Brighi, Pietro, et al. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” SciPost Physics, vol. 15, no. 3, 093, SciPost Foundation, 2023, doi:10.21468/scipostphys.15.3.093. short: P. Brighi, M. Ljubotina, M. Serbyn, SciPost Physics 15 (2023). date_created: 2023-09-14T13:08:23Z date_published: 2023-09-13T00:00:00Z date_updated: 2023-09-20T10:46:29Z day: '13' ddc: - '530' department: - _id: MaSe doi: 10.21468/scipostphys.15.3.093 ec_funded: 1 external_id: arxiv: - '2210.15607' file: - access_level: open_access checksum: 4cef6a8021f6b6c47ab2f2f2b1387ac2 content_type: application/pdf creator: dernst date_created: 2023-09-20T10:46:10Z date_updated: 2023-09-20T10:46:10Z file_id: '14350' file_name: 2023_SciPostPhysics_Brighi.pdf file_size: 4866506 relation: main_file success: 1 file_date_updated: 2023-09-20T10:46:10Z has_accepted_license: '1' intvolume: ' 15' issue: '3' keyword: - General Physics and Astronomy language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: SciPost Physics publication_identifier: issn: - 2542-4653 publication_status: published publisher: SciPost Foundation quality_controlled: '1' related_material: record: - id: '12750' relation: earlier_version status: public status: public title: Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 15 year: '2023' ... --- _id: '14406' abstract: - lang: eng text: "Recently, a concept of generalized multifractality, which characterizes fluctuations and correlations of critical eigenstates, was introduced and explored for all 10 symmetry classes of disordered systems. Here, by using the nonlinear sigma-model (\r\nNL\r\nσ\r\nM\r\n) field theory, we extend the theory of generalized multifractality to boundaries of systems at criticality. Our numerical simulations on two-dimensional systems of symmetry classes A, C, and AII fully confirm the analytical predictions of pure-scaling observables and Weyl symmetry relations between critical exponents of surface generalized multifractality. This demonstrates the validity of the \r\nNL\r\nσ\r\nM\r\n for the description of Anderson-localization critical phenomena, not only in the bulk but also on the boundary. The critical exponents strongly violate generalized parabolicity, in analogy with earlier results for the bulk, corroborating the conclusion that the considered Anderson-localization critical points are not described by conformal field theories. We further derive relations between generalized surface multifractal spectra and linear combinations of Lyapunov exponents of a strip in quasi-one-dimensional geometry, which hold under the assumption of invariance with respect to a logarithmic conformal map. Our numerics demonstrate that these relations hold with an excellent accuracy. Taken together, our results indicate an intriguing situation: the conformal invariance is broken but holds partially at critical points of Anderson localization." acknowledgement: "We thank Ilya Gruzberg for many illuminating discussions. S.S.B., J.F.K., and A.D.M. acknowledge support by the Deutsche Forschungsgemeinschaft (DFG) via the Grant\r\nNo. MI 658/14-1. I.S.B. acknowledges support from Russian Science Foundation (Grant No. 22-42-04416)." article_number: '104205' article_processing_charge: No article_type: original author: - first_name: Serafim full_name: Babkin, Serafim id: 41e64307-6672-11ee-b9ad-cc7a0075a479 last_name: Babkin orcid: 0009-0003-7382-8036 - first_name: Jonas F. full_name: Karcher, Jonas F. last_name: Karcher - first_name: Igor S. full_name: Burmistrov, Igor S. last_name: Burmistrov - first_name: Alexander D. full_name: Mirlin, Alexander D. last_name: Mirlin citation: ama: Babkin S, Karcher JF, Burmistrov IS, Mirlin AD. Generalized surface multifractality in two-dimensional disordered systems. Physical Review B. 2023;108(10). doi:10.1103/PhysRevB.108.104205 apa: Babkin, S., Karcher, J. F., Burmistrov, I. S., & Mirlin, A. D. (2023). Generalized surface multifractality in two-dimensional disordered systems. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.108.104205 chicago: Babkin, Serafim, Jonas F. Karcher, Igor S. Burmistrov, and Alexander D. Mirlin. “Generalized Surface Multifractality in Two-Dimensional Disordered Systems.” Physical Review B. American Physical Society, 2023. https://doi.org/10.1103/PhysRevB.108.104205. ieee: S. Babkin, J. F. Karcher, I. S. Burmistrov, and A. D. Mirlin, “Generalized surface multifractality in two-dimensional disordered systems,” Physical Review B, vol. 108, no. 10. American Physical Society, 2023. ista: Babkin S, Karcher JF, Burmistrov IS, Mirlin AD. 2023. Generalized surface multifractality in two-dimensional disordered systems. Physical Review B. 108(10), 104205. mla: Babkin, Serafim, et al. “Generalized Surface Multifractality in Two-Dimensional Disordered Systems.” Physical Review B, vol. 108, no. 10, 104205, American Physical Society, 2023, doi:10.1103/PhysRevB.108.104205. short: S. Babkin, J.F. Karcher, I.S. Burmistrov, A.D. Mirlin, Physical Review B 108 (2023). date_created: 2023-10-08T22:01:17Z date_published: 2023-09-01T00:00:00Z date_updated: 2023-10-09T07:09:30Z day: '01' department: - _id: MaSe doi: 10.1103/PhysRevB.108.104205 external_id: arxiv: - '2306.09455' intvolume: ' 108' issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2306.09455 month: '09' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Generalized surface multifractality in two-dimensional disordered systems type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 108 year: '2023' ... --- _id: '13125' abstract: - lang: eng text: 'The quantum approximate optimization algorithm (QAOA) is a variational quantum algorithm, where a quantum computer implements a variational ansatz consisting of p layers of alternating unitary operators and a classical computer is used to optimize the variational parameters. For a random initialization, the optimization typically leads to local minima with poor performance, motivating the search for initialization strategies of QAOA variational parameters. Although numerous heuristic initializations exist, an analytical understanding and performance guarantees for large p remain evasive.We introduce a greedy initialization of QAOA which guarantees improving performance with an increasing number of layers. Our main result is an analytic construction of 2p + 1 transition states—saddle points with a unique negative curvature direction—for QAOA with p + 1 layers that use the local minimum of QAOA with p layers. Transition states connect to new local minima, which are guaranteed to lower the energy compared to the minimum found for p layers. We use the GREEDY procedure to navigate the exponentially increasing with p number of local minima resulting from the recursive application of our analytic construction. The performance of the GREEDY procedure matches available initialization strategies while providing a guarantee for the minimal energy to decrease with an increasing number of layers p. ' acknowledgement: 'We thank V. Verteletskyi for a joint collaboration on numerical studies of the QAOA during his internship at ISTA that inspired analytic results on TS reported in this work. We acknowledge A. A. Mele and M. Brooks for discussions and D. Egger, P. Love, and D. Wierichs for valuable feedback on the manuscript. S.H.S., R.A.M., and M.S. acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899). R.K. is supported by the SFB BeyondC (Grant No. F7107-N38) and the project QuantumReady (FFG 896217). ' article_number: '062404' article_processing_charge: No article_type: original author: - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack orcid: 0000-0001-5400-8508 - first_name: Raimel A full_name: Medina Ramos, Raimel A id: CE680B90-D85A-11E9-B684-C920E6697425 last_name: Medina Ramos orcid: 0000-0002-5383-2869 - first_name: Richard full_name: Kueng, Richard last_name: Kueng - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Sack S, Medina Ramos RA, Kueng R, Serbyn M. Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement. Physical Review A. 2023;107(6). doi:10.1103/physreva.107.062404 apa: Sack, S., Medina Ramos, R. A., Kueng, R., & Serbyn, M. (2023). Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement. Physical Review A. American Physical Society. https://doi.org/10.1103/physreva.107.062404 chicago: Sack, Stefan, Raimel A Medina Ramos, Richard Kueng, and Maksym Serbyn. “Recursive Greedy Initialization of the Quantum Approximate Optimization Algorithm with Guaranteed Improvement.” Physical Review A. American Physical Society, 2023. https://doi.org/10.1103/physreva.107.062404. ieee: S. Sack, R. A. Medina Ramos, R. Kueng, and M. Serbyn, “Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement,” Physical Review A, vol. 107, no. 6. American Physical Society, 2023. ista: Sack S, Medina Ramos RA, Kueng R, Serbyn M. 2023. Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement. Physical Review A. 107(6), 062404. mla: Sack, Stefan, et al. “Recursive Greedy Initialization of the Quantum Approximate Optimization Algorithm with Guaranteed Improvement.” Physical Review A, vol. 107, no. 6, 062404, American Physical Society, 2023, doi:10.1103/physreva.107.062404. short: S. Sack, R.A. Medina Ramos, R. Kueng, M. Serbyn, Physical Review A 107 (2023). date_created: 2023-06-07T06:57:32Z date_published: 2023-06-02T00:00:00Z date_updated: 2023-12-13T14:47:25Z day: '02' ddc: - '530' department: - _id: MaSe doi: 10.1103/physreva.107.062404 ec_funded: 1 external_id: arxiv: - '2209.01159' isi: - '001016927100012' file: - access_level: open_access checksum: 0d71423888eeccaa60d8f41197f26306 content_type: application/pdf creator: dernst date_created: 2023-06-13T07:28:36Z date_updated: 2023-06-13T07:28:36Z file_id: '13131' file_name: 2023_PhysRevA_Sack.pdf file_size: 2524611 relation: main_file success: 1 file_date_updated: 2023-06-13T07:28:36Z has_accepted_license: '1' intvolume: ' 107' isi: 1 issue: '6' language: - iso: eng month: '06' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review A publication_identifier: eissn: - 2469-9934 issn: - 2469-9926 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '14622' relation: dissertation_contains status: public scopus_import: '1' status: public title: Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 107 year: '2023' ... --- _id: '14622' alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack orcid: 0000-0001-5400-8508 citation: ama: 'Sack S. Improving variational quantum algorithms: Innovative initialization techniques and extensions to qudit systems. 2023. doi:10.15479/at:ista:14622' apa: 'Sack, S. (2023). Improving variational quantum algorithms: Innovative initialization techniques and extensions to qudit systems. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:14622' chicago: 'Sack, Stefan. “Improving Variational Quantum Algorithms: Innovative Initialization Techniques and Extensions to Qudit Systems.” Institute of Science and Technology Austria, 2023. https://doi.org/10.15479/at:ista:14622.' ieee: 'S. Sack, “Improving variational quantum algorithms: Innovative initialization techniques and extensions to qudit systems,” Institute of Science and Technology Austria, 2023.' ista: 'Sack S. 2023. Improving variational quantum algorithms: Innovative initialization techniques and extensions to qudit systems. Institute of Science and Technology Austria.' mla: 'Sack, Stefan. Improving Variational Quantum Algorithms: Innovative Initialization Techniques and Extensions to Qudit Systems. Institute of Science and Technology Austria, 2023, doi:10.15479/at:ista:14622.' short: 'S. Sack, Improving Variational Quantum Algorithms: Innovative Initialization Techniques and Extensions to Qudit Systems, Institute of Science and Technology Austria, 2023.' date_created: 2023-11-28T10:58:13Z date_published: 2023-11-30T00:00:00Z date_updated: 2023-12-13T14:47:25Z day: '30' ddc: - '530' degree_awarded: PhD department: - _id: GradSch - _id: MaSe doi: 10.15479/at:ista:14622 ec_funded: 1 file: - access_level: closed checksum: 068fd3570506ec42b2faa390de784bc4 content_type: application/pdf creator: ssack date_created: 2023-11-30T15:53:10Z date_updated: 2023-12-01T11:10:46Z embargo: 2024-11-30 embargo_to: open_access file_id: '14635' file_name: PhD_Thesis.pdf file_size: 11947523 relation: main_file - access_level: closed checksum: 0fa3bc0d108aed0ac59d2c6beef2220a content_type: application/zip creator: ssack date_created: 2023-11-30T15:54:11Z date_updated: 2023-12-01T11:10:46Z file_id: '14636' file_name: PhD Thesis (1).zip file_size: 18422964 relation: source_file file_date_updated: 2023-12-01T11:10:46Z has_accepted_license: '1' language: - iso: eng month: '11' oa_version: Published Version page: '142' project: - _id: bd660c93-d553-11ed-ba76-fb0fb6f49c0d name: Quantum_Quantum Circuits and Software_Variational quantum algorithms on NISQ devices - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication_identifier: issn: - 2663 - 337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '11471' relation: part_of_dissertation status: public - id: '13125' relation: part_of_dissertation status: public - id: '9760' relation: part_of_dissertation status: public status: public supervisor: - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 title: 'Improving variational quantum algorithms: Innovative initialization techniques and extensions to qudit systems' tmp: image: /images/cc_by_nc_sa.png legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) short: CC BY-NC-SA (4.0) type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2023' ... --- _id: '14690' abstract: - lang: eng text: Generalized multifractality characterizes system size dependence of pure scaling local observables at Anderson transitions in all 10 symmetry classes of disordered systems. Recently, the concept of generalized multifractality has been extended to boundaries of critical disordered noninteracting systems. Here we study the generalized boundary multifractality in the presence of electron-electron interaction, focusing on the spin quantum Hall symmetry class (class C). Employing the two-loop renormalization group analysis within the Finkel'stein nonlinear sigma model, we compute the anomalous dimensions of the pure scaling operators located at the boundary of the system. We find that generalized boundary multifractal exponents are twice larger than their bulk counterparts. Exact symmetry relations between generalized boundary multifractal exponents in the case of noninteracting systems are explicitly broken by the interaction. acknowledgement: The authors are grateful to J. Karcher and A. Mirlin for collaboration on the related project. We thank I. Gruzberg and A. Mirlin for useful discussions and comments. I.S.B. is grateful to M. Parfenov and P. Ostrovsky for collaboration on the related project. The research was supported by Russian Science Foundation (Grant No. 22-42-04416). article_number: '205429' article_processing_charge: No article_type: original author: - first_name: Serafim full_name: Babkin, Serafim id: 41e64307-6672-11ee-b9ad-cc7a0075a479 last_name: Babkin orcid: 0009-0003-7382-8036 - first_name: I full_name: Burmistrov, I last_name: Burmistrov citation: ama: Babkin S, Burmistrov I. Boundary multifractality in the spin quantum Hall symmetry class with interaction. Physical Review B. 2023;108(20). doi:10.1103/PhysRevB.108.205429 apa: Babkin, S., & Burmistrov, I. (2023). Boundary multifractality in the spin quantum Hall symmetry class with interaction. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.108.205429 chicago: Babkin, Serafim, and I Burmistrov. “Boundary Multifractality in the Spin Quantum Hall Symmetry Class with Interaction.” Physical Review B. American Physical Society, 2023. https://doi.org/10.1103/PhysRevB.108.205429. ieee: S. Babkin and I. Burmistrov, “Boundary multifractality in the spin quantum Hall symmetry class with interaction,” Physical Review B, vol. 108, no. 20. American Physical Society, 2023. ista: Babkin S, Burmistrov I. 2023. Boundary multifractality in the spin quantum Hall symmetry class with interaction. Physical Review B. 108(20), 205429. mla: Babkin, Serafim, and I. Burmistrov. “Boundary Multifractality in the Spin Quantum Hall Symmetry Class with Interaction.” Physical Review B, vol. 108, no. 20, 205429, American Physical Society, 2023, doi:10.1103/PhysRevB.108.205429. short: S. Babkin, I. Burmistrov, Physical Review B 108 (2023). date_created: 2023-12-17T23:00:53Z date_published: 2023-11-15T00:00:00Z date_updated: 2023-12-18T08:45:28Z day: '15' department: - _id: MaSe doi: 10.1103/PhysRevB.108.205429 external_id: arxiv: - '2308.16852' intvolume: ' 108' issue: '20' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.2308.16852' month: '11' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Boundary multifractality in the spin quantum Hall symmetry class with interaction type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 108 year: '2023' ... --- _id: '10769' abstract: - lang: eng text: studiamos aspectos de Teoría Cuántica de Campos a densidad finita usando técnicas y conceptos de información cuántica. Nos enfocamos en fermiones de Dirac masivos con potencial químico en 1+1 dimensiones espacio-temporales. Usando la entropía de entrelazamiento en un intervalo, construimos la función c entrópica que es finita. Esta función c no es monótona, e incorpora el entrelazamiento de largo alcance proveniente de la superficie de Fermi. Motivados por trabajos previos de modelos en la red, calculamos numéricamente las entropías de Renyi y encontramos oscilaciones de Friedel. Seguidamente, analizamos la información mutua como una medida de correlación entre diferentes regiones. Usando una expansión de distancia grande desarrollada por Cardy, argumentamos que la información mutua detecta las correlaciones inducidas por la superficie de Fermi todavía al orden dominante en la expansión. Finalmente, analizamos la entropía relativa y sus generalizaciones de Renyi para distinguir estados con diferente carga. Encontramos que estados en diferentes sectores de superselección dan origen a un comportamiento super-extensivo en la entropía relativa. acknowledgement: "Se agradece a Horacio Casini por distintas discusiones y comentarios a lo largo del trabajo. LD cuenta con el apoyo de CNEA y UNCuyo, Inst. GT cuenta con el apoyo de CONICET,\r\nANPCyT, CNEA, y UNCuyo, Inst. Balseiro. RM cuenta con el apoyo de IST Austria. MS cuenta con el apoyode CONICET y UNCuyo, Inst. Balseiro. También se agradece a la Asociación Argentina de Física por la posibilidad de presentar este artículo en el marco de una Mención Especial por el Premio Luis Másperi 2020." article_processing_charge: No article_type: original author: - first_name: L. full_name: Daguerre, L. last_name: Daguerre - first_name: G. full_name: Torroba, G. last_name: Torroba - first_name: Raimel A full_name: Medina Ramos, Raimel A id: CE680B90-D85A-11E9-B684-C920E6697425 last_name: Medina Ramos - first_name: M. full_name: Solís, M. last_name: Solís citation: ama: 'Daguerre L, Torroba G, Medina Ramos RA, Solís M. Non relativistic quantum field theory: Dynamics and irreversibility. Anales de la Asociacion Fisica Argentina. 2022;32(4):93-98. doi:10.31527/analesafa.2021.32.4.93' apa: 'Daguerre, L., Torroba, G., Medina Ramos, R. A., & Solís, M. (2022). Non relativistic quantum field theory: Dynamics and irreversibility. Anales de la Asociacion Fisica Argentina. Asociación Física Argentina. https://doi.org/10.31527/analesafa.2021.32.4.93' chicago: 'Daguerre, L., G. Torroba, Raimel A Medina Ramos, and M. Solís. “Non relativistic quantum field theory: Dynamics and irreversibility.” Anales de la Asociacion Fisica Argentina. Asociación Física Argentina, 2022. https://doi.org/10.31527/analesafa.2021.32.4.93.' ieee: 'L. Daguerre, G. Torroba, R. A. Medina Ramos, and M. Solís, “Non relativistic quantum field theory: Dynamics and irreversibility,” Anales de la Asociacion Fisica Argentina, vol. 32, no. 4. Asociación Física Argentina, pp. 93–98, 2022.' ista: 'Daguerre L, Torroba G, Medina Ramos RA, Solís M. 2022. Non relativistic quantum field theory: Dynamics and irreversibility. Anales de la Asociacion Fisica Argentina. 32(4), 93–98.' mla: 'Daguerre, L., et al. “Non relativistic quantum field theory: Dynamics and irreversibility.” Anales de la Asociacion Fisica Argentina, vol. 32, no. 4, Asociación Física Argentina, 2022, pp. 93–98, doi:10.31527/analesafa.2021.32.4.93.' short: L. Daguerre, G. Torroba, R.A. Medina Ramos, M. Solís, Anales de la Asociacion Fisica Argentina 32 (2022) 93–98. date_created: 2022-02-20T23:01:32Z date_published: 2022-01-13T00:00:00Z date_updated: 2022-02-21T09:36:01Z day: '13' ddc: - '530' department: - _id: MaSe doi: 10.31527/analesafa.2021.32.4.93 file: - access_level: open_access checksum: ca66a3017205677c5b4d22b3bb74fb0b content_type: application/pdf creator: dernst date_created: 2022-02-21T09:32:44Z date_updated: 2022-02-21T09:32:44Z file_id: '10782' file_name: 2022_AnalesAFA_Daguerre.pdf file_size: 4505751 relation: main_file success: 1 file_date_updated: 2022-02-21T09:32:44Z has_accepted_license: '1' intvolume: ' 32' issue: '4' language: - iso: spa month: '01' oa: 1 oa_version: Published Version page: 93-98 publication: Anales de la Asociacion Fisica Argentina publication_identifier: eissn: - '18501168' publication_status: published publisher: Asociación Física Argentina quality_controlled: '1' scopus_import: '1' status: public title: 'Non relativistic quantum field theory: Dynamics and irreversibility' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 32 year: '2022' ... --- _id: '12111' abstract: - lang: eng text: Quantum impurities exhibit fascinating many-body phenomena when the small interacting impurity changes the physics of a large noninteracting environment. The characterisation of such strongly correlated nonperturbative effects is particularly challenging due to the infinite size of the environment, and the inability of local correlators to capture the buildup of long-ranged entanglement in the system. Here, we harness an entanglement-based observable—the purity of the impurity—as a witness for the formation of strong correlations. We showcase the utility of our scheme by exactly solving the open Kondo box model in the small box limit, and thus describe all-electronic dot-cavity devices. Specifically, we conclusively characterize the metal-to-insulator phase transition in the system and identify how the (conducting) dot-lead Kondo singlet is quenched by an (insulating) intraimpurity singlet formation. Furthermore, we propose an experimentally feasible tomography protocol for the measurement of the purity, which motivates the observation of impurity physics through their entanglement build up. acknowledgement: We thank G. Blatter, T. Ihn, K. Ensslin, M. Goldstein, C. Carisch, and J. del Pino for illuminating discussions and acknowledge financial support from the Swiss National Science Foundation (SNSF) through Project No. 190078, and from the Deutsche Forschungsgemeinschaft (DFG) - Project No. 449653034. Our numerical implementations are based on the ITensors JULIA library [64]. article_number: '043177' article_processing_charge: No article_type: original author: - first_name: Lidia full_name: Stocker, Lidia last_name: Stocker - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack - first_name: Michael S. full_name: Ferguson, Michael S. last_name: Ferguson - first_name: Oded full_name: Zilberberg, Oded last_name: Zilberberg citation: ama: Stocker L, Sack S, Ferguson MS, Zilberberg O. Entanglement-based observables for quantum impurities. Physical Review Research. 2022;4(4). doi:10.1103/PhysRevResearch.4.043177 apa: Stocker, L., Sack, S., Ferguson, M. S., & Zilberberg, O. (2022). Entanglement-based observables for quantum impurities. Physical Review Research. American Physical Society. https://doi.org/10.1103/PhysRevResearch.4.043177 chicago: Stocker, Lidia, Stefan Sack, Michael S. Ferguson, and Oded Zilberberg. “Entanglement-Based Observables for Quantum Impurities.” Physical Review Research. American Physical Society, 2022. https://doi.org/10.1103/PhysRevResearch.4.043177. ieee: L. Stocker, S. Sack, M. S. Ferguson, and O. Zilberberg, “Entanglement-based observables for quantum impurities,” Physical Review Research, vol. 4, no. 4. American Physical Society, 2022. ista: Stocker L, Sack S, Ferguson MS, Zilberberg O. 2022. Entanglement-based observables for quantum impurities. Physical Review Research. 4(4), 043177. mla: Stocker, Lidia, et al. “Entanglement-Based Observables for Quantum Impurities.” Physical Review Research, vol. 4, no. 4, 043177, American Physical Society, 2022, doi:10.1103/PhysRevResearch.4.043177. short: L. Stocker, S. Sack, M.S. Ferguson, O. Zilberberg, Physical Review Research 4 (2022). date_created: 2023-01-08T23:00:53Z date_published: 2022-12-01T00:00:00Z date_updated: 2023-02-13T09:08:28Z day: '01' ddc: - '530' department: - _id: MaSe doi: 10.1103/PhysRevResearch.4.043177 file: - access_level: open_access checksum: 556820cf6e4af77c8476e5b8f4114d1a content_type: application/pdf creator: dernst date_created: 2023-01-20T12:03:31Z date_updated: 2023-01-20T12:03:31Z file_id: '12328' file_name: 2022_PhysicalReviewResearch_Stocker.pdf file_size: 2941167 relation: main_file success: 1 file_date_updated: 2023-01-20T12:03:31Z has_accepted_license: '1' intvolume: ' 4' issue: '4' language: - iso: eng month: '12' oa: 1 oa_version: Published Version publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Entanglement-based observables for quantum impurities tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 4 year: '2022' ... --- _id: '12276' abstract: - lang: eng text: Ongoing development of quantum simulators allows for a progressively finer degree of control of quantum many-body systems. This motivates the development of efficient approaches to facilitate the control of such systems and enable the preparation of nontrivial quantum states. Here we formulate an approach to control quantum systems based on matrix product states (MPSs). We compare counterdiabatic and leakage minimization approaches to the so-called local steering problem that consists in finding the best value of the control parameters for generating a unitary evolution of the specific MPS in a given direction. In order to benchmark the different approaches, we apply them to the generalization of the PXP model known to exhibit coherent quantum dynamics due to quantum many-body scars. We find that the leakage-based approach generally outperforms the counterdiabatic framework and use it to construct a Floquet model with quantum scars. We perform the first steps towards global trajectory optimization and demonstrate entanglement steering capabilities in the generalized PXP model. Finally, we apply our leakage minimization approach to construct quantum scars in the periodically driven nonintegrable Ising model. acknowledgement: We thank A. A. Michailidis for insightful discussions. M.L. and M.S. acknowledge support from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 850899). D.A. is supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 864597) and by the Swiss National Science Foundation. The infinite TEBD simulations were performed using the ITensor library [67]. article_number: '030343' article_processing_charge: No article_type: original author: - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina - first_name: Barbara full_name: Roos, Barbara id: 5DA90512-D80F-11E9-8994-2E2EE6697425 last_name: Roos orcid: 0000-0002-9071-5880 - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Ljubotina M, Roos B, Abanin DA, Serbyn M. Optimal steering of matrix product states and quantum many-body scars. PRX Quantum. 2022;3(3). doi:10.1103/prxquantum.3.030343 apa: Ljubotina, M., Roos, B., Abanin, D. A., & Serbyn, M. (2022). Optimal steering of matrix product states and quantum many-body scars. PRX Quantum. American Physical Society. https://doi.org/10.1103/prxquantum.3.030343 chicago: Ljubotina, Marko, Barbara Roos, Dmitry A. Abanin, and Maksym Serbyn. “Optimal Steering of Matrix Product States and Quantum Many-Body Scars.” PRX Quantum. American Physical Society, 2022. https://doi.org/10.1103/prxquantum.3.030343. ieee: M. Ljubotina, B. Roos, D. A. Abanin, and M. Serbyn, “Optimal steering of matrix product states and quantum many-body scars,” PRX Quantum, vol. 3, no. 3. American Physical Society, 2022. ista: Ljubotina M, Roos B, Abanin DA, Serbyn M. 2022. Optimal steering of matrix product states and quantum many-body scars. PRX Quantum. 3(3), 030343. mla: Ljubotina, Marko, et al. “Optimal Steering of Matrix Product States and Quantum Many-Body Scars.” PRX Quantum, vol. 3, no. 3, 030343, American Physical Society, 2022, doi:10.1103/prxquantum.3.030343. short: M. Ljubotina, B. Roos, D.A. Abanin, M. Serbyn, PRX Quantum 3 (2022). date_created: 2023-01-16T10:01:56Z date_published: 2022-09-23T00:00:00Z date_updated: 2023-01-30T11:05:23Z day: '23' ddc: - '530' department: - _id: MaSe - _id: RoSe doi: 10.1103/prxquantum.3.030343 ec_funded: 1 external_id: arxiv: - '2204.02899' file: - access_level: open_access checksum: ef8f0a1b5a019b3958009162de0fa4c3 content_type: application/pdf creator: dernst date_created: 2023-01-30T11:02:50Z date_updated: 2023-01-30T11:02:50Z file_id: '12457' file_name: 2022_PRXQuantum_Ljubotina.pdf file_size: 7661905 relation: main_file success: 1 file_date_updated: 2023-01-30T11:02:50Z has_accepted_license: '1' intvolume: ' 3' issue: '3' keyword: - General Medicine language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: PRX Quantum publication_identifier: eissn: - 2691-3399 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Optimal steering of matrix product states and quantum many-body scars tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 3 year: '2022' ... --- _id: '10863' abstract: - lang: eng text: 'Nonlinear optical responses are commonly used as a probe for studying the electronic properties of materials. For topological materials, studies thus far focused on photogalvanic electric currents, which are forbidden in centrosymmetric materials because they require broken inversion symmetry. In this Letter, we propose a class of symmetry-allowed responses for inversion-symmetric topological insulators with two doubly degenerate bands. We consider a specific example of such a response, the orbital current, and show that the sign of the response reflects the Z2 topological index, i.e., the orbital current changes sign at the transition between trivial and topological insulator phases. This is illustrated in two models of topological insulators: the Bernevig-Hughes-Zhang model and the 1T′ phase of transition metal dichalcogenides.' acknowledgement: "We are grateful to Takahiro Morimoto and Zhanybek Alpichshev for fruitful discussions. MD was supported by Austrian Agency for International Cooperation in Education and Research (OeAD-GmbH) and by the John Seo Fellowship at MIT. HI was supported by JSPS KAKENHI Grant Numbers JP19K14649 and JP18H03676, and by UTokyo Global Activity Support Program for\r\nYoung Researchers." article_number: L121407 article_processing_charge: No article_type: letter_note author: - first_name: Margarita full_name: Davydova, Margarita last_name: Davydova - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Hiroaki full_name: Ishizuka, Hiroaki last_name: Ishizuka citation: ama: Davydova M, Serbyn M, Ishizuka H. Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. Physical Review B. 2022;105. doi:10.1103/PhysRevB.105.L121407 apa: Davydova, M., Serbyn, M., & Ishizuka, H. (2022). Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.105.L121407 chicago: Davydova, Margarita, Maksym Serbyn, and Hiroaki Ishizuka. “Symmetry-Allowed Nonlinear Orbital Response across the Topological Phase Transition in Centrosymmetric Materials.” Physical Review B. American Physical Society, 2022. https://doi.org/10.1103/PhysRevB.105.L121407. ieee: M. Davydova, M. Serbyn, and H. Ishizuka, “Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials,” Physical Review B, vol. 105. American Physical Society, 2022. ista: Davydova M, Serbyn M, Ishizuka H. 2022. Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials. Physical Review B. 105, L121407. mla: Davydova, Margarita, et al. “Symmetry-Allowed Nonlinear Orbital Response across the Topological Phase Transition in Centrosymmetric Materials.” Physical Review B, vol. 105, L121407, American Physical Society, 2022, doi:10.1103/PhysRevB.105.L121407. short: M. Davydova, M. Serbyn, H. Ishizuka, Physical Review B 105 (2022). date_created: 2022-03-18T10:20:46Z date_published: 2022-03-17T00:00:00Z date_updated: 2023-08-03T06:09:56Z day: '17' department: - _id: MaSe doi: 10.1103/PhysRevB.105.L121407 external_id: arxiv: - '2101.08277' isi: - '000800752500001' intvolume: ' 105' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2101.08277 month: '03' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: issn: - 2469-9969 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Symmetry-allowed nonlinear orbital response across the topological phase transition in centrosymmetric materials type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 105 year: '2022' ... --- _id: '11337' abstract: - lang: eng text: 'Nonanalytic points in the return probability of a quantum state as a function of time, known as dynamical quantum phase transitions (DQPTs), have received great attention in recent years, but the understanding of their mechanism is still incomplete. In our recent work [Phys. Rev. Lett. 126, 040602 (2021)], we demonstrated that one-dimensional DQPTs can be produced by two distinct mechanisms, namely semiclassical precession and entanglement generation, leading to the definition of precession (pDQPTs) and entanglement (eDQPTs) dynamical quantum phase transitions. In this manuscript, we extend and investigate the notion of p- and eDQPTs in two-dimensional systems by considering semi-infinite ladders of varying width. For square lattices, we find that pDQPTs and eDQPTs persist and are characterized by similar phenomenology as in 1D: pDQPTs are associated with a magnetization sign change and a wide entanglement gap, while eDQPTs correspond to suppressed local observables and avoided crossings in the entanglement spectrum. However, DQPTs show higher sensitivity to the ladder width and other details, challenging the extrapolation to the thermodynamic limit especially for eDQPTs. Moving to honeycomb lattices, we also demonstrate that lattices with an odd number of nearest neighbors give rise to phenomenologies beyond the one-dimensional classification.' acknowledgement: "We acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 850899).\r\nS.D.N. also acknowledges funding from the Institute of Science and Technology (IST) Austria, and from the European Union’s Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie Grant Agreement No. 754411." article_number: '165149' article_processing_charge: No article_type: original author: - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: De Nicola S, Michailidis A, Serbyn M. Entanglement and precession in two-dimensional dynamical quantum phase transitions. Physical Review B. 2022;105. doi:10.1103/PhysRevB.105.165149 apa: De Nicola, S., Michailidis, A., & Serbyn, M. (2022). Entanglement and precession in two-dimensional dynamical quantum phase transitions. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.105.165149 chicago: De Nicola, Stefano, Alexios Michailidis, and Maksym Serbyn. “Entanglement and Precession in Two-Dimensional Dynamical Quantum Phase Transitions.” Physical Review B. American Physical Society, 2022. https://doi.org/10.1103/PhysRevB.105.165149. ieee: S. De Nicola, A. Michailidis, and M. Serbyn, “Entanglement and precession in two-dimensional dynamical quantum phase transitions,” Physical Review B, vol. 105. American Physical Society, 2022. ista: De Nicola S, Michailidis A, Serbyn M. 2022. Entanglement and precession in two-dimensional dynamical quantum phase transitions. Physical Review B. 105, 165149. mla: De Nicola, Stefano, et al. “Entanglement and Precession in Two-Dimensional Dynamical Quantum Phase Transitions.” Physical Review B, vol. 105, 165149, American Physical Society, 2022, doi:10.1103/PhysRevB.105.165149. short: S. De Nicola, A. Michailidis, M. Serbyn, Physical Review B 105 (2022). date_created: 2022-04-28T08:06:10Z date_published: 2022-04-15T00:00:00Z date_updated: 2023-08-03T06:33:33Z day: '15' department: - _id: MaSe doi: 10.1103/PhysRevB.105.165149 ec_funded: 1 external_id: arxiv: - '2112.11273' isi: - '000806812400004' intvolume: ' 105' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.2112.11273' month: '04' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Physical Review B publication_identifier: eisbn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Entanglement and precession in two-dimensional dynamical quantum phase transitions type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 105 year: '2022' ... --- _id: '11379' abstract: - lang: eng text: Bernal-stacked multilayer graphene is a versatile platform to explore quantum transport phenomena and interaction physics due to its exceptional tunability via electrostatic gating. For instance, upon applying a perpendicular electric field, its band structure exhibits several off-center Dirac points (so-called Dirac gullies) in each valley. Here, the formation of Dirac gullies and the interaction-induced breakdown of gully coherence is explored via magnetotransport measurements in high-quality Bernal-stacked (ABA) trilayer graphene. At zero magnetic field, multiple Lifshitz transitions indicating the formation of Dirac gullies are identified. In the quantum Hall regime, the emergence of Dirac gullies is evident as an increase in Landau level degeneracy. When tuning both electric and magnetic fields, electron–electron interactions can be controllably enhanced until, beyond critical electric and magnetic fields, the gully degeneracy is eventually lifted. The arising correlated ground state is consistent with a previously predicted nematic phase that spontaneously breaks the rotational gully symmetry. acknowledgement: "We acknowledge funding from the Center for Nanoscience (CeNS) and by the Deutsche\r\nForschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy-EXC-2111-390814868 (MCQST). K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan (Grant Number PMXP0112101001) and JSPS KAKENHI (Grant Numbers 19H05790 and JP20H00354)." article_processing_charge: No article_type: original author: - first_name: Felix full_name: Winterer, Felix last_name: Winterer - first_name: Anna M. full_name: Seiler, Anna M. last_name: Seiler - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Fabian R. full_name: Geisenhof, Fabian R. last_name: Geisenhof - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: R. Thomas full_name: Weitz, R. Thomas last_name: Weitz citation: ama: Winterer F, Seiler AM, Ghazaryan A, et al. Spontaneous gully-polarized quantum hall states in ABA trilayer graphene. Nano Letters. 2022;22(8):3317-3322. doi:10.1021/acs.nanolett.2c00435 apa: Winterer, F., Seiler, A. M., Ghazaryan, A., Geisenhof, F. R., Watanabe, K., Taniguchi, T., … Weitz, R. T. (2022). Spontaneous gully-polarized quantum hall states in ABA trilayer graphene. Nano Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.2c00435 chicago: Winterer, Felix, Anna M. Seiler, Areg Ghazaryan, Fabian R. Geisenhof, Kenji Watanabe, Takashi Taniguchi, Maksym Serbyn, and R. Thomas Weitz. “Spontaneous Gully-Polarized Quantum Hall States in ABA Trilayer Graphene.” Nano Letters. American Chemical Society, 2022. https://doi.org/10.1021/acs.nanolett.2c00435. ieee: F. Winterer et al., “Spontaneous gully-polarized quantum hall states in ABA trilayer graphene,” Nano Letters, vol. 22, no. 8. American Chemical Society, pp. 3317–3322, 2022. ista: Winterer F, Seiler AM, Ghazaryan A, Geisenhof FR, Watanabe K, Taniguchi T, Serbyn M, Weitz RT. 2022. Spontaneous gully-polarized quantum hall states in ABA trilayer graphene. Nano Letters. 22(8), 3317–3322. mla: Winterer, Felix, et al. “Spontaneous Gully-Polarized Quantum Hall States in ABA Trilayer Graphene.” Nano Letters, vol. 22, no. 8, American Chemical Society, 2022, pp. 3317–22, doi:10.1021/acs.nanolett.2c00435. short: F. Winterer, A.M. Seiler, A. Ghazaryan, F.R. Geisenhof, K. Watanabe, T. Taniguchi, M. Serbyn, R.T. Weitz, Nano Letters 22 (2022) 3317–3322. date_created: 2022-05-15T22:01:41Z date_published: 2022-04-27T00:00:00Z date_updated: 2023-08-03T07:12:45Z day: '27' department: - _id: MaSe doi: 10.1021/acs.nanolett.2c00435 external_id: arxiv: - '2109.00556' isi: - '000809056900019' intvolume: ' 22' isi: 1 issue: '8' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.2109.00556' month: '04' oa: 1 oa_version: Preprint page: 3317-3322 publication: Nano Letters publication_identifier: eissn: - '15306992' issn: - '15306984' publication_status: published publisher: American Chemical Society quality_controlled: '1' scopus_import: '1' status: public title: Spontaneous gully-polarized quantum hall states in ABA trilayer graphene type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 22 year: '2022' ... --- _id: '11470' abstract: - lang: eng text: Many-body localization (MBL) is an example of a dynamical phase of matter that avoids thermalization. While the MBL phase is robust to weak local perturbations, the fate of an MBL system coupled to a thermalizing quantum system that represents a “heat bath” is an open question that is actively investigated theoretically and experimentally. In this work, we consider the stability of an Anderson insulator with a finite density of particles interacting with a single mobile impurity—a small quantum bath. We give perturbative arguments that support the stability of localization in the strong interaction regime. Large-scale tensor network simulations of dynamics are employed to corroborate the presence of the localized phase and give quantitative predictions in the thermodynamic limit. We develop a phenomenological description of the dynamics in the strong interaction regime, and we demonstrate that the impurity effectively turns the Anderson insulator into an MBL phase, giving rise to nontrivial entanglement dynamics well captured by our phenomenology. acknowledged_ssus: - _id: ScienComp acknowledgement: We acknowledge useful discussions with M. Ljubotina. P. B., A. M., and M. S. were supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899). D.A. was supported by the Swiss National Science Foundation and by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 864597). The development of parallel TEBD code was was supported by S. Elefante from the Scientific Computing (SciComp) that is part of Scientific Service Units (SSU) of IST Austria. Some of the computations were performed on the Baobab cluster of the University of Geneva. article_number: L220203 article_processing_charge: No article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Alexios A. full_name: Michailidis, Alexios A. last_name: Michailidis - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Michailidis AA, Abanin DA, Serbyn M. Propagation of many-body localization in an Anderson insulator. Physical Review B. 2022;105(22). doi:10.1103/physrevb.105.l220203 apa: Brighi, P., Michailidis, A. A., Abanin, D. A., & Serbyn, M. (2022). Propagation of many-body localization in an Anderson insulator. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.105.l220203 chicago: Brighi, Pietro, Alexios A. Michailidis, Dmitry A. Abanin, and Maksym Serbyn. “Propagation of Many-Body Localization in an Anderson Insulator.” Physical Review B. American Physical Society, 2022. https://doi.org/10.1103/physrevb.105.l220203. ieee: P. Brighi, A. A. Michailidis, D. A. Abanin, and M. Serbyn, “Propagation of many-body localization in an Anderson insulator,” Physical Review B, vol. 105, no. 22. American Physical Society, 2022. ista: Brighi P, Michailidis AA, Abanin DA, Serbyn M. 2022. Propagation of many-body localization in an Anderson insulator. Physical Review B. 105(22), L220203. mla: Brighi, Pietro, et al. “Propagation of Many-Body Localization in an Anderson Insulator.” Physical Review B, vol. 105, no. 22, L220203, American Physical Society, 2022, doi:10.1103/physrevb.105.l220203. short: P. Brighi, A.A. Michailidis, D.A. Abanin, M. Serbyn, Physical Review B 105 (2022). date_created: 2022-06-29T20:20:47Z date_published: 2022-06-27T00:00:00Z date_updated: 2023-08-03T07:23:52Z day: '27' department: - _id: MaSe doi: 10.1103/physrevb.105.l220203 ec_funded: 1 external_id: arxiv: - '2109.07332' isi: - '000823050000012' intvolume: ' 105' isi: 1 issue: '22' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.2109.07332' month: '06' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '12732' relation: dissertation_contains status: public status: public title: Propagation of many-body localization in an Anderson insulator type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 105 year: '2022' ... --- _id: '12259' abstract: - lang: eng text: 'Theoretical foundations of chaos have been predominantly laid out for finite-dimensional dynamical systems, such as the three-body problem in classical mechanics and the Lorenz model in dissipative systems. In contrast, many real-world chaotic phenomena, e.g., weather, arise in systems with many (formally infinite) degrees of freedom, which limits direct quantitative analysis of such systems using chaos theory. In the present work, we demonstrate that the hydrodynamic pilot-wave systems offer a bridge between low- and high-dimensional chaotic phenomena by allowing for a systematic study of how the former connects to the latter. Specifically, we present experimental results, which show the formation of low-dimensional chaotic attractors upon destabilization of regular dynamics and a final transition to high-dimensional chaos via the merging of distinct chaotic regions through a crisis bifurcation. Moreover, we show that the post-crisis dynamics of the system can be rationalized as consecutive scatterings from the nonattracting chaotic sets with lifetimes following exponential distributions. ' acknowledgement: 'This work was partially funded by the Institute of Science and Technology Austria Interdisciplinary Project Committee Grant “Pilot-Wave Hydrodynamics: Chaos and Quantum Analogies.”' article_number: '093138' article_processing_charge: No article_type: original author: - first_name: George H full_name: Choueiri, George H id: 448BD5BC-F248-11E8-B48F-1D18A9856A87 last_name: Choueiri - first_name: Balachandra full_name: Suri, Balachandra id: 47A5E706-F248-11E8-B48F-1D18A9856A87 last_name: Suri - first_name: Jack full_name: Merrin, Jack id: 4515C308-F248-11E8-B48F-1D18A9856A87 last_name: Merrin orcid: 0000-0001-5145-4609 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Björn full_name: Hof, Björn id: 3A374330-F248-11E8-B48F-1D18A9856A87 last_name: Hof orcid: 0000-0003-2057-2754 - first_name: Nazmi B full_name: Budanur, Nazmi B id: 3EA1010E-F248-11E8-B48F-1D18A9856A87 last_name: Budanur orcid: 0000-0003-0423-5010 citation: ama: 'Choueiri GH, Suri B, Merrin J, Serbyn M, Hof B, Budanur NB. Crises and chaotic scattering in hydrodynamic pilot-wave experiments. Chaos: An Interdisciplinary Journal of Nonlinear Science. 2022;32(9). doi:10.1063/5.0102904' apa: 'Choueiri, G. H., Suri, B., Merrin, J., Serbyn, M., Hof, B., & Budanur, N. B. (2022). Crises and chaotic scattering in hydrodynamic pilot-wave experiments. Chaos: An Interdisciplinary Journal of Nonlinear Science. AIP Publishing. https://doi.org/10.1063/5.0102904' chicago: 'Choueiri, George H, Balachandra Suri, Jack Merrin, Maksym Serbyn, Björn Hof, and Nazmi B Budanur. “Crises and Chaotic Scattering in Hydrodynamic Pilot-Wave Experiments.” Chaos: An Interdisciplinary Journal of Nonlinear Science. AIP Publishing, 2022. https://doi.org/10.1063/5.0102904.' ieee: 'G. H. Choueiri, B. Suri, J. Merrin, M. Serbyn, B. Hof, and N. B. Budanur, “Crises and chaotic scattering in hydrodynamic pilot-wave experiments,” Chaos: An Interdisciplinary Journal of Nonlinear Science, vol. 32, no. 9. AIP Publishing, 2022.' ista: 'Choueiri GH, Suri B, Merrin J, Serbyn M, Hof B, Budanur NB. 2022. Crises and chaotic scattering in hydrodynamic pilot-wave experiments. Chaos: An Interdisciplinary Journal of Nonlinear Science. 32(9), 093138.' mla: 'Choueiri, George H., et al. “Crises and Chaotic Scattering in Hydrodynamic Pilot-Wave Experiments.” Chaos: An Interdisciplinary Journal of Nonlinear Science, vol. 32, no. 9, 093138, AIP Publishing, 2022, doi:10.1063/5.0102904.' short: 'G.H. Choueiri, B. Suri, J. Merrin, M. Serbyn, B. Hof, N.B. Budanur, Chaos: An Interdisciplinary Journal of Nonlinear Science 32 (2022).' date_created: 2023-01-16T09:58:16Z date_published: 2022-09-26T00:00:00Z date_updated: 2023-08-04T09:51:17Z day: '26' ddc: - '530' department: - _id: MaSe - _id: BjHo - _id: NanoFab doi: 10.1063/5.0102904 external_id: arxiv: - '2206.01531' isi: - '000861009600005' file: - access_level: open_access checksum: 17881eff8b21969359a2dd64620120ba content_type: application/pdf creator: dernst date_created: 2023-01-30T09:41:12Z date_updated: 2023-01-30T09:41:12Z file_id: '12445' file_name: 2022_Chaos_Choueiri.pdf file_size: 3209644 relation: main_file success: 1 file_date_updated: 2023-01-30T09:41:12Z has_accepted_license: '1' intvolume: ' 32' isi: 1 issue: '9' keyword: - Applied Mathematics - General Physics and Astronomy - Mathematical Physics - Statistical and Nonlinear Physics language: - iso: eng month: '09' oa: 1 oa_version: Published Version publication: 'Chaos: An Interdisciplinary Journal of Nonlinear Science' publication_identifier: eissn: - 1089-7682 issn: - 1054-1500 publication_status: published publisher: AIP Publishing quality_controlled: '1' scopus_import: '1' status: public title: Crises and chaotic scattering in hydrodynamic pilot-wave experiments tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 32 year: '2022' ... --- _id: '12269' abstract: - lang: eng text: We study the thermalization of a small XX chain coupled to long, gapped XXZ leads at either side by observing the relaxation dynamics of the whole system. Using extensive tensor network simulations, we show that such systems, although not integrable, appear to show either extremely slow thermalization or even lack thereof since the two cannot be distinguished within the accuracy of our numerics. We show that the persistent oscillations observed in the spin current in the middle of the XX chain are related to eigenstates of the entire system located within the gap of the boundary chains. We find from exact diagonalization that some of these states remain strictly localized within the XX chain and do not hybridize with the rest of the system. The frequencies of the persistent oscillations determined by numerical simulations of dynamics match the energy differences between these states exactly. This has important implications for open systems, where the strongly interacting leads are often assumed to thermalize the central system. Our results suggest that, if we employ gapped systems for the leads, this assumption does not hold. acknowledgement: "M.L. and T.P. acknowledge support from the European Research Council (ERC) through the advanced grant 694544 – OMNES and the grant P1-0402 of Slovenian Research Agency (ARRS). M.L. acknowledges support from the European Research Council (ERC) through the starting grant 850899 – NEQuM. D.R. acknowledges support from the Ministry of Electronics & Information Technology (MeitY), India under the grant for “Centre for Excellence in Quantum\r\nTechnologies” with Ref. No. 4(7)/2020-ITEA. " article_number: '054314' article_processing_charge: No article_type: original author: - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina - first_name: Dibyendu full_name: Roy, Dibyendu last_name: Roy - first_name: Tomaž full_name: Prosen, Tomaž last_name: Prosen citation: ama: Ljubotina M, Roy D, Prosen T. Absence of thermalization of free systems coupled to gapped interacting reservoirs. Physical Review B. 2022;106(5). doi:10.1103/physrevb.106.054314 apa: Ljubotina, M., Roy, D., & Prosen, T. (2022). Absence of thermalization of free systems coupled to gapped interacting reservoirs. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.106.054314 chicago: Ljubotina, Marko, Dibyendu Roy, and Tomaž Prosen. “Absence of Thermalization of Free Systems Coupled to Gapped Interacting Reservoirs.” Physical Review B. American Physical Society, 2022. https://doi.org/10.1103/physrevb.106.054314. ieee: M. Ljubotina, D. Roy, and T. Prosen, “Absence of thermalization of free systems coupled to gapped interacting reservoirs,” Physical Review B, vol. 106, no. 5. American Physical Society, 2022. ista: Ljubotina M, Roy D, Prosen T. 2022. Absence of thermalization of free systems coupled to gapped interacting reservoirs. Physical Review B. 106(5), 054314. mla: Ljubotina, Marko, et al. “Absence of Thermalization of Free Systems Coupled to Gapped Interacting Reservoirs.” Physical Review B, vol. 106, no. 5, 054314, American Physical Society, 2022, doi:10.1103/physrevb.106.054314. short: M. Ljubotina, D. Roy, T. Prosen, Physical Review B 106 (2022). date_created: 2023-01-16T10:00:39Z date_published: 2022-08-31T00:00:00Z date_updated: 2023-08-04T10:07:33Z day: '31' department: - _id: MaSe doi: 10.1103/physrevb.106.054314 ec_funded: 1 external_id: arxiv: - '2106.08373' isi: - '000861332900005' intvolume: ' 106' isi: 1 issue: '5' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2106.08373 month: '08' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Absence of thermalization of free systems coupled to gapped interacting reservoirs type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 106 year: '2022' ... --- _id: '11469' abstract: - lang: eng text: Thermalizing and localized many-body quantum systems present two distinct dynamical phases of matter. Recently the fate of a localized system coupled to a thermalizing system viewed as a quantum bath received significant theoretical and experimental attention. In this work, we study a mobile impurity, representing a small quantum bath, that interacts locally with an Anderson insulator with a finite density of localized particles. Using static Hartree approximation to obtain an effective disorder strength, we formulate an analytic criterion for the perturbative stability of the localization. Next, we use an approximate dynamical Hartree method and the quasi-exact time-evolved block decimation (TEBD) algorithm to study the dynamics of the system. We find that the dynamical Hartree approach which completely ignores entanglement between the impurity and localized particles predicts the delocalization of the system. In contrast, the full numerical simulation of the unitary dynamics with TEBD suggests the stability of localization on numerically accessible timescales. Finally, using an extension of the density matrix renormalization group algorithm to excited states (DMRG-X), we approximate the highly excited eigenstates of the system. We find that the impurity remains localized in the eigenstates and entanglement is enhanced in a finite region around the position of the impurity, confirming the dynamical predictions. Dynamics and the DMRG-X results provide compelling evidence for the stability of localization. acknowledged_ssus: - _id: ScienComp acknowledgement: We thank M. Ljubotina for insightful discussions. P. B., A. M. and M. S. acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899). D. A. was supported by the Swiss National Science Foundation and by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 864597). The development of parallel TEBD code was supported by S. Elefante from the Scientific Computing (SciComp) that is part of Scientific Service Units (SSU) of IST Austria. Some of the computations were performed on the Baobab cluster of the University of Geneva. article_number: '224208' article_processing_charge: No article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Kristina full_name: Kirova, Kristina id: 4aeda2ae-f847-11ec-98e0-c4a66fe174d4 last_name: Kirova - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Michailidis A, Kirova K, Abanin DA, Serbyn M. Localization of a mobile impurity interacting with an Anderson insulator. Physical Review B. 2022;105(22). doi:10.1103/physrevb.105.224208 apa: Brighi, P., Michailidis, A., Kirova, K., Abanin, D. A., & Serbyn, M. (2022). Localization of a mobile impurity interacting with an Anderson insulator. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.105.224208 chicago: Brighi, Pietro, Alexios Michailidis, Kristina Kirova, Dmitry A. Abanin, and Maksym Serbyn. “Localization of a Mobile Impurity Interacting with an Anderson Insulator.” Physical Review B. American Physical Society, 2022. https://doi.org/10.1103/physrevb.105.224208. ieee: P. Brighi, A. Michailidis, K. Kirova, D. A. Abanin, and M. Serbyn, “Localization of a mobile impurity interacting with an Anderson insulator,” Physical Review B, vol. 105, no. 22. American Physical Society, 2022. ista: Brighi P, Michailidis A, Kirova K, Abanin DA, Serbyn M. 2022. Localization of a mobile impurity interacting with an Anderson insulator. Physical Review B. 105(22), 224208. mla: Brighi, Pietro, et al. “Localization of a Mobile Impurity Interacting with an Anderson Insulator.” Physical Review B, vol. 105, no. 22, 224208, American Physical Society, 2022, doi:10.1103/physrevb.105.224208. short: P. Brighi, A. Michailidis, K. Kirova, D.A. Abanin, M. Serbyn, Physical Review B 105 (2022). date_created: 2022-06-29T20:19:51Z date_published: 2022-06-27T00:00:00Z date_updated: 2023-09-05T12:12:52Z day: '27' department: - _id: MaSe doi: 10.1103/physrevb.105.224208 ec_funded: 1 external_id: arxiv: - '2111.08603' isi: - '000823050000001' intvolume: ' 105' isi: 1 issue: '22' language: - iso: eng main_file_link: - open_access: '1' url: ' https://doi.org/10.48550/arXiv.2111.08603 Focus to learn more' month: '06' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '12732' relation: dissertation_contains status: public status: public title: Localization of a mobile impurity interacting with an Anderson insulator type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 105 year: '2022' ... --- _id: '12750' abstract: - lang: eng text: Quantum kinetically constrained models have recently attracted significant attention due to their anomalous dynamics and thermalization. In this work, we introduce a hitherto unexplored family of kinetically constrained models featuring a conserved particle number and strong inversion-symmetry breaking due to facilitated hopping. We demonstrate that these models provide a generic example of so-called quantum Hilbert space fragmentation, that is manifested in disconnected sectors in the Hilbert space that are not apparent in the computational basis. Quantum Hilbert space fragmentation leads to an exponential in system size number of eigenstates with exactly zero entanglement entropy across several bipartite cuts. These eigenstates can be probed dynamically using quenches from simple initial product states. In addition, we study the particle spreading under unitary dynamics launched from the domain wall state, and find faster than diffusive dynamics at high particle densities, that crosses over into logarithmically slow relaxation at smaller densities. Using a classically simulable cellular automaton, we reproduce the logarithmic dynamics observed in the quantum case. Our work suggests that particle conserving constrained models with inversion symmetry breaking realize so far unexplored universality classes of dynamics and invite their further theoretical and experimental studies. article_number: '2210.15607' article_processing_charge: No author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Marko full_name: Ljubotina, Marko id: F75EE9BE-5C90-11EA-905D-16643DDC885E last_name: Ljubotina orcid: 0000-0003-0038-7068 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Ljubotina M, Serbyn M. Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. arXiv. doi:10.48550/arXiv.2210.15607 apa: Brighi, P., Ljubotina, M., & Serbyn, M. (n.d.). Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. arXiv. https://doi.org/10.48550/arXiv.2210.15607 chicago: Brighi, Pietro, Marko Ljubotina, and Maksym Serbyn. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2210.15607. ieee: P. Brighi, M. Ljubotina, and M. Serbyn, “Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models,” arXiv. . ista: Brighi P, Ljubotina M, Serbyn M. Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. arXiv, 2210.15607. mla: Brighi, Pietro, et al. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” ArXiv, 2210.15607, doi:10.48550/arXiv.2210.15607. short: P. Brighi, M. Ljubotina, M. Serbyn, ArXiv (n.d.). date_created: 2023-03-23T14:33:13Z date_published: 2022-11-07T00:00:00Z date_updated: 2023-09-20T10:46:29Z day: '07' department: - _id: GradSch - _id: MaSe doi: 10.48550/arXiv.2210.15607 external_id: arxiv: - '2210.15607' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2210.15607 month: '11' oa: 1 oa_version: Preprint publication: arXiv publication_status: submitted related_material: record: - id: '12732' relation: dissertation_contains status: public - id: '14334' relation: later_version status: public status: public title: Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models tmp: image: /images/cc_by_nc_sa.png legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) short: CC BY-NC-SA (4.0) type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2022' ... --- _id: '10851' abstract: - lang: eng text: Superconductor-semiconductor hybrid devices are at the heart of several proposed approaches to quantum information processing, but their basic properties remain to be understood. We embed a twodimensional Al-InAs hybrid system in a resonant microwave circuit, probing the breakdown of superconductivity due to an applied magnetic field. We find a fingerprint from the two-component nature of the hybrid system, and quantitatively compare with a theory that includes the contribution of intraband p±ip pairing in the InAs, as well as the emergence of Bogoliubov-Fermi surfaces due to magnetic field. Separately resolving the Al and InAs contributions allows us to determine the carrier density and mobility in the InAs. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: M. S. acknowledges useful discussions with A. Levchenko and P. A. Lee, and E. Berg. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility. J. S. and A. G. acknowledge funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754411.W. M. Hatefipour, W. M. Strickland and J. Shabani acknowledge funding from Office of Naval Research Award No. N00014-21-1-2450. article_number: '107701' article_processing_charge: No article_type: original author: - first_name: Duc T full_name: Phan, Duc T id: 29C8C0B4-F248-11E8-B48F-1D18A9856A87 last_name: Phan - first_name: Jorden L full_name: Senior, Jorden L id: 5479D234-2D30-11EA-89CC-40953DDC885E last_name: Senior orcid: 0000-0002-0672-9295 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: M. full_name: Hatefipour, M. last_name: Hatefipour - first_name: W. M. full_name: Strickland, W. M. last_name: Strickland - first_name: J. full_name: Shabani, J. last_name: Shabani - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Andrew P full_name: Higginbotham, Andrew P id: 4AD6785A-F248-11E8-B48F-1D18A9856A87 last_name: Higginbotham orcid: 0000-0003-2607-2363 citation: ama: Phan DT, Senior JL, Ghazaryan A, et al. Detecting induced p±ip pairing at the Al-InAs interface with a quantum microwave circuit. Physical Review Letters. 2022;128(10). doi:10.1103/physrevlett.128.107701 apa: Phan, D. T., Senior, J. L., Ghazaryan, A., Hatefipour, M., Strickland, W. M., Shabani, J., … Higginbotham, A. P. (2022). Detecting induced p±ip pairing at the Al-InAs interface with a quantum microwave circuit. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.128.107701 chicago: Phan, Duc T, Jorden L Senior, Areg Ghazaryan, M. Hatefipour, W. M. Strickland, J. Shabani, Maksym Serbyn, and Andrew P Higginbotham. “Detecting Induced P±ip Pairing at the Al-InAs Interface with a Quantum Microwave Circuit.” Physical Review Letters. American Physical Society, 2022. https://doi.org/10.1103/physrevlett.128.107701. ieee: D. T. Phan et al., “Detecting induced p±ip pairing at the Al-InAs interface with a quantum microwave circuit,” Physical Review Letters, vol. 128, no. 10. American Physical Society, 2022. ista: Phan DT, Senior JL, Ghazaryan A, Hatefipour M, Strickland WM, Shabani J, Serbyn M, Higginbotham AP. 2022. Detecting induced p±ip pairing at the Al-InAs interface with a quantum microwave circuit. Physical Review Letters. 128(10), 107701. mla: Phan, Duc T., et al. “Detecting Induced P±ip Pairing at the Al-InAs Interface with a Quantum Microwave Circuit.” Physical Review Letters, vol. 128, no. 10, 107701, American Physical Society, 2022, doi:10.1103/physrevlett.128.107701. short: D.T. Phan, J.L. Senior, A. Ghazaryan, M. Hatefipour, W.M. Strickland, J. Shabani, M. Serbyn, A.P. Higginbotham, Physical Review Letters 128 (2022). date_created: 2022-03-17T11:37:47Z date_published: 2022-03-11T00:00:00Z date_updated: 2023-11-30T10:56:03Z day: '11' department: - _id: MaSe - _id: AnHi doi: 10.1103/physrevlett.128.107701 ec_funded: 1 external_id: arxiv: - '2107.03695' isi: - '000771391100002' pmid: - ' 35333085' intvolume: ' 128' isi: 1 issue: '10' keyword: - General Physics and Astronomy language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2107.03695 month: '03' oa: 1 oa_version: Preprint pmid: 1 project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: link: - description: News on ISTA Website relation: press_release url: https://ista.ac.at/en/news/characterizing-super-semi-sandwiches-for-quantum-computing/ record: - id: '10029' relation: earlier_version status: public - id: '14547' relation: dissertation_contains status: public scopus_import: '1' status: public title: Detecting induced p±ip pairing at the Al-InAs interface with a quantum microwave circuit type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 128 year: '2022' ... --- _id: '11471' abstract: - lang: eng text: 'Variational quantum algorithms are promising algorithms for achieving quantum advantage on nearterm devices. The quantum hardware is used to implement a variational wave function and measure observables, whereas the classical computer is used to store and update the variational parameters. The optimization landscape of expressive variational ansätze is however dominated by large regions in parameter space, known as barren plateaus, with vanishing gradients, which prevents efficient optimization. In this work we propose a general algorithm to avoid barren plateaus in the initialization and throughout the optimization. To this end we define a notion of weak barren plateaus (WBPs) based on the entropies of local reduced density matrices. The presence of WBPs can be efficiently quantified using recently introduced shadow tomography of the quantum state with a classical computer. We demonstrate that avoidance of WBPs suffices to ensure sizable gradients in the initialization. In addition, we demonstrate that decreasing the gradient step size, guided by the entropies allows WBPs to be avoided during the optimization process. This paves the way for efficient barren plateau-free optimization on near-term devices. ' acknowledgement: "We thank Marco Cerezo, Zoe Holmes, and Nicholas Hunter-Jones for fruitful discussion and valuable feedback. We also acknowledge Adam Smith, Johannes Jakob Meyer, and Victor V. Albert for comments on the paper. The simulations were performed in the Julia programming\r\nlanguage [65] using the Yao module [66]. S.H.S., R.A.M., A.A.M. and M.S. acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899)." article_number: '020365' article_processing_charge: No article_type: original author: - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack orcid: 0000-0001-5400-8508 - first_name: Raimel A full_name: Medina Ramos, Raimel A id: CE680B90-D85A-11E9-B684-C920E6697425 last_name: Medina Ramos orcid: 0000-0002-5383-2869 - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Richard full_name: Kueng, Richard last_name: Kueng - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Sack S, Medina Ramos RA, Michailidis A, Kueng R, Serbyn M. Avoiding barren plateaus using classical shadows. PRX Quantum. 2022;3(2). doi:10.1103/prxquantum.3.020365 apa: Sack, S., Medina Ramos, R. A., Michailidis, A., Kueng, R., & Serbyn, M. (2022). Avoiding barren plateaus using classical shadows. PRX Quantum. American Physical Society. https://doi.org/10.1103/prxquantum.3.020365 chicago: Sack, Stefan, Raimel A Medina Ramos, Alexios Michailidis, Richard Kueng, and Maksym Serbyn. “Avoiding Barren Plateaus Using Classical Shadows.” PRX Quantum. American Physical Society, 2022. https://doi.org/10.1103/prxquantum.3.020365. ieee: S. Sack, R. A. Medina Ramos, A. Michailidis, R. Kueng, and M. Serbyn, “Avoiding barren plateaus using classical shadows,” PRX Quantum, vol. 3, no. 2. American Physical Society, 2022. ista: Sack S, Medina Ramos RA, Michailidis A, Kueng R, Serbyn M. 2022. Avoiding barren plateaus using classical shadows. PRX Quantum. 3(2), 020365. mla: Sack, Stefan, et al. “Avoiding Barren Plateaus Using Classical Shadows.” PRX Quantum, vol. 3, no. 2, 020365, American Physical Society, 2022, doi:10.1103/prxquantum.3.020365. short: S. Sack, R.A. Medina Ramos, A. Michailidis, R. Kueng, M. Serbyn, PRX Quantum 3 (2022). date_created: 2022-06-29T20:21:32Z date_published: 2022-06-29T00:00:00Z date_updated: 2023-12-13T14:47:24Z day: '29' ddc: - '530' department: - _id: MaSe doi: 10.1103/prxquantum.3.020365 ec_funded: 1 external_id: arxiv: - '2201.08194' isi: - '000822564300001' file: - access_level: open_access checksum: a7706b28d24a0e32a55ea04b82a2df43 content_type: application/pdf creator: dernst date_created: 2022-06-30T07:14:48Z date_updated: 2022-06-30T07:14:48Z file_id: '11472' file_name: 2022_PRXQuantum_Sack.pdf file_size: 4231591 relation: main_file success: 1 file_date_updated: 2022-06-30T07:14:48Z has_accepted_license: '1' intvolume: ' 3' isi: 1 issue: '2' keyword: - General Medicine language: - iso: eng month: '06' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: PRX Quantum publication_identifier: issn: - 2691-3399 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '14622' relation: dissertation_contains status: public status: public title: Avoiding barren plateaus using classical shadows tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 3 year: '2022' ... --- _id: '8198' abstract: - lang: eng text: We investigate how the critical driving amplitude at the Floquet many-body localized (MBL) to ergodic phase transition differs between smooth and nonsmooth drives. To this end, we numerically study a disordered spin-1/2 chain which is periodically driven by a sine or square-wave drive over a wide range of driving frequencies. In both cases the critical driving amplitude increases monotonically with the frequency, and at large frequencies it is identical for the two drives. However, at low and intermediate frequencies the critical amplitude of the square-wave drive depends strongly on the frequency, while that of the sinusoidal drive is almost constant over a wide frequency range. By analyzing the density of drive-induced resonances we conclude that this difference is due to resonances induced by the higher harmonics which are present (absent) in the Fourier spectrum of the square-wave (sine) drive. Furthermore, we suggest a numerically efficient method for estimating the frequency dependence of the critical driving amplitudes for different drives which is based on calculating the density of drive-induced resonances. We conclude that delocalization occurs once the density of drive-induced resonances reaches a critical value determined only by the static system. acknowledgement: We thank Y. Bar Lev, T. Biadse, and, particularly, E. Bairey and B. Katzir for illuminating discussions and their many insights and help. The authors thank N. Lindner for his support throughout this project. We are further grateful to M. Serbyn, A. Kamenev, A. Turner, and S. de Nicola for reading the manuscript and providing good feedback and suggestions. We acknowledge financial support from the Defense Advanced Research Projects Agency through the DRINQS program, Grant No. D18AC00025. T.G. was in part supported by an Aly Kaufman Fellowship at the Technion. T.G. acknowledges funding from the Institute of Science and Technology (IST) Austria and from the European Union’s Horizon 2020 research and innovation program under Marie SkłodowskaCurie Grant Agreement No. 754411.under the Marie Skłodowska-Curie Grant Agreement No.754411. article_number: '214204' article_processing_charge: No article_type: original author: - first_name: Asaf A. full_name: Diringer, Asaf A. last_name: Diringer - first_name: Tobias full_name: Gulden, Tobias id: 1083E038-9F73-11E9-A4B5-532AE6697425 last_name: Gulden orcid: 0000-0001-6814-7541 citation: ama: Diringer AA, Gulden T. Impact of drive harmonics on the stability of Floquet many-body localization. Physical Review B. 2021;103(21). doi:10.1103/PhysRevB.103.214204 apa: Diringer, A. A., & Gulden, T. (2021). Impact of drive harmonics on the stability of Floquet many-body localization. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.103.214204 chicago: Diringer, Asaf A., and Tobias Gulden. “Impact of Drive Harmonics on the Stability of Floquet Many-Body Localization.” Physical Review B. American Physical Society, 2021. https://doi.org/10.1103/PhysRevB.103.214204. ieee: A. A. Diringer and T. Gulden, “Impact of drive harmonics on the stability of Floquet many-body localization,” Physical Review B, vol. 103, no. 21. American Physical Society, 2021. ista: Diringer AA, Gulden T. 2021. Impact of drive harmonics on the stability of Floquet many-body localization. Physical Review B. 103(21), 214204. mla: Diringer, Asaf A., and Tobias Gulden. “Impact of Drive Harmonics on the Stability of Floquet Many-Body Localization.” Physical Review B, vol. 103, no. 21, 214204, American Physical Society, 2021, doi:10.1103/PhysRevB.103.214204. short: A.A. Diringer, T. Gulden, Physical Review B 103 (2021). date_created: 2020-08-04T13:03:40Z date_published: 2021-06-21T00:00:00Z date_updated: 2023-08-04T10:56:33Z day: '21' department: - _id: MaSe doi: 10.1103/PhysRevB.103.214204 ec_funded: 1 external_id: arxiv: - '2007.14879' isi: - '000664429700005' intvolume: ' 103' isi: 1 issue: '21' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2007.14879 month: '06' oa: 1 oa_version: Preprint project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Physical Review B publication_identifier: eissn: - '24699969' issn: - '24699950' publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Impact of drive harmonics on the stability of Floquet many-body localization type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 103 year: '2021' ... --- _id: '9020' abstract: - lang: eng text: 'We study dynamics and thermodynamics of ion transport in narrow, water-filled channels, considered as effective 1D Coulomb systems. The long range nature of the inter-ion interactions comes about due to the dielectric constants mismatch between the water and the surrounding medium, confining the electric filed to stay mostly within the water-filled channel. Statistical mechanics of such Coulomb systems is dominated by entropic effects which may be accurately accounted for by mapping onto an effective quantum mechanics. In presence of multivalent ions the corresponding quantum mechanics appears to be non-Hermitian. In this review we discuss a framework for semiclassical calculations for the effective non-Hermitian Hamiltonians. Non-Hermiticity elevates WKB action integrals from the real line to closed cycles on a complex Riemann surfaces where direct calculations are not attainable. We circumvent this issue by applying tools from algebraic topology, such as the Picard-Fuchs equation. We discuss how its solutions relate to the thermodynamics and correlation functions of multivalent solutions within narrow, water-filled channels. ' acknowledgement: "A.K. was supported by NSF grants DMR-2037654. T.G. acknowledges funding from the Institute of Science and Technology (IST) Austria, and from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754411.\r\nWe are indebted to Boris Shklovskii for introducing us to the problem, and Alexander Gorsky and Peter Koroteev for introducing us to the Picard-Fuchs methods. A very special thanks goes to Michael Janas for several years of excellent collaboration on these topics. TG thanks Michael Kreshchuk for introduction to the exact WKB method and great collaboration on related projects. Figure 3 and Figure 4 are reproduced from Reference [25] with friendly permission by the Russian Academy of Sciences. Figure 2, Figure 4, Figure 5, Figure 6, and Figure 8 are reproduced from Reference [26] with friendly permission by IOP Publishing." article_number: e23010125 article_processing_charge: Yes article_type: original author: - first_name: Tobias full_name: Gulden, Tobias id: 1083E038-9F73-11E9-A4B5-532AE6697425 last_name: Gulden orcid: 0000-0001-6814-7541 - first_name: Alex full_name: Kamenev, Alex last_name: Kamenev citation: ama: Gulden T, Kamenev A. Dynamics of ion channels via non-hermitian quantum mechanics. Entropy. 2021;23(1). doi:10.3390/e23010125 apa: Gulden, T., & Kamenev, A. (2021). Dynamics of ion channels via non-hermitian quantum mechanics. Entropy. MDPI. https://doi.org/10.3390/e23010125 chicago: Gulden, Tobias, and Alex Kamenev. “Dynamics of Ion Channels via Non-Hermitian Quantum Mechanics.” Entropy. MDPI, 2021. https://doi.org/10.3390/e23010125. ieee: T. Gulden and A. Kamenev, “Dynamics of ion channels via non-hermitian quantum mechanics,” Entropy, vol. 23, no. 1. MDPI, 2021. ista: Gulden T, Kamenev A. 2021. Dynamics of ion channels via non-hermitian quantum mechanics. Entropy. 23(1), e23010125. mla: Gulden, Tobias, and Alex Kamenev. “Dynamics of Ion Channels via Non-Hermitian Quantum Mechanics.” Entropy, vol. 23, no. 1, e23010125, MDPI, 2021, doi:10.3390/e23010125. short: T. Gulden, A. Kamenev, Entropy 23 (2021). date_created: 2021-01-19T11:12:06Z date_published: 2021-01-19T00:00:00Z date_updated: 2023-08-07T13:34:18Z day: '19' ddc: - '530' department: - _id: MaSe doi: 10.3390/e23010125 ec_funded: 1 external_id: arxiv: - '2012.01390' isi: - '000610122000001' file: - access_level: open_access checksum: 6cd0e706156827c45c740534bd32c179 content_type: application/pdf creator: tgulden date_created: 2021-01-19T11:11:14Z date_updated: 2021-01-19T11:11:14Z file_id: '9021' file_name: Final published paper.pdf file_size: 981285 relation: main_file file_date_updated: 2021-01-19T11:11:14Z has_accepted_license: '1' intvolume: ' 23' isi: 1 issue: '1' language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Entropy publication_identifier: eissn: - 1099-4300 publication_status: published publisher: MDPI quality_controlled: '1' status: public title: Dynamics of ion channels via non-hermitian quantum mechanics tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 23 year: '2021' ... --- _id: '9158' abstract: - lang: eng text: While several tools have been developed to study the ground state of many-body quantum spin systems, the limitations of existing techniques call for the exploration of new approaches. In this manuscript we develop an alternative analytical and numerical framework for many-body quantum spin ground states, based on the disentanglement formalism. In this approach, observables are exactly expressed as Gaussian-weighted functional integrals over scalar fields. We identify the leading contribution to these integrals, given by the saddle point of a suitable effective action. Analytically, we develop a field-theoretical expansion of the functional integrals, performed by means of appropriate Feynman rules. The expansion can be truncated to a desired order to obtain analytical approximations to observables. Numerically, we show that the disentanglement approach can be used to compute ground state expectation values from classical stochastic processes. While the associated fluctuations grow exponentially with imaginary time and the system size, this growth can be mitigated by means of an importance sampling scheme based on knowledge of the saddle point configuration. We illustrate the advantages and limitations of our methods by considering the quantum Ising model in 1, 2 and 3 spatial dimensions. Our analytical and numerical approaches are applicable to a broad class of systems, bridging concepts from quantum lattice models, continuum field theory, and classical stochastic processes. acknowledgement: "S D N would like to thank M J Bhaseen, J Chalker, B Doyon, V Gritsev, A Lamacraft,\r\nA Michailidis and M Serbyn for helpful feedback and stimulating conversations. S D N\r\nacknowledges funding from the Institute of Science and Technology (IST) Austria, and\r\nfrom the European Union’s Horizon 2020 research and innovation program under the\r\nMarie Sk\blodowska-Curie Grant Agreement No. 754411. S D N also acknowledges funding\r\nfrom the EPSRC Center for Doctoral Training in Cross-Disciplinary Approaches to Non-\r\nEquilibrium Systems (CANES) under Grant EP/L015854/1. S D N is grateful to IST\r\nAustria for providing open access funding." article_number: '013101' article_processing_charge: No article_type: original author: - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 citation: ama: 'De Nicola S. Disentanglement approach to quantum spin ground states: Field theory and stochastic simulation. Journal of Statistical Mechanics: Theory and Experiment. 2021;2021(1). doi:10.1088/1742-5468/abc7c7' apa: 'De Nicola, S. (2021). Disentanglement approach to quantum spin ground states: Field theory and stochastic simulation. Journal of Statistical Mechanics: Theory and Experiment. IOP Publishing. https://doi.org/10.1088/1742-5468/abc7c7' chicago: 'De Nicola, Stefano. “Disentanglement Approach to Quantum Spin Ground States: Field Theory and Stochastic Simulation.” Journal of Statistical Mechanics: Theory and Experiment. IOP Publishing, 2021. https://doi.org/10.1088/1742-5468/abc7c7.' ieee: 'S. De Nicola, “Disentanglement approach to quantum spin ground states: Field theory and stochastic simulation,” Journal of Statistical Mechanics: Theory and Experiment, vol. 2021, no. 1. IOP Publishing, 2021.' ista: 'De Nicola S. 2021. Disentanglement approach to quantum spin ground states: Field theory and stochastic simulation. Journal of Statistical Mechanics: Theory and Experiment. 2021(1), 013101.' mla: 'De Nicola, Stefano. “Disentanglement Approach to Quantum Spin Ground States: Field Theory and Stochastic Simulation.” Journal of Statistical Mechanics: Theory and Experiment, vol. 2021, no. 1, 013101, IOP Publishing, 2021, doi:10.1088/1742-5468/abc7c7.' short: 'S. De Nicola, Journal of Statistical Mechanics: Theory and Experiment 2021 (2021).' date_created: 2021-02-17T17:48:46Z date_published: 2021-01-05T00:00:00Z date_updated: 2023-08-07T13:46:28Z day: '05' ddc: - '530' department: - _id: MaSe doi: 10.1088/1742-5468/abc7c7 ec_funded: 1 external_id: isi: - '000605080300001' file: - access_level: open_access checksum: 64e2aae4837790db26e1dd1986c69c07 content_type: application/pdf creator: dernst date_created: 2021-02-19T14:04:40Z date_updated: 2021-02-19T14:04:40Z file_id: '9172' file_name: 2021_JourStatMech_deNicola.pdf file_size: 1693609 relation: main_file success: 1 file_date_updated: 2021-02-19T14:04:40Z has_accepted_license: '1' intvolume: ' 2021' isi: 1 issue: '1' keyword: - Statistics - Probability and Uncertainty - Statistics and Probability - Statistical and Nonlinear Physics language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: B67AFEDC-15C9-11EA-A837-991A96BB2854 name: IST Austria Open Access Fund publication: 'Journal of Statistical Mechanics: Theory and Experiment' publication_identifier: issn: - 1742-5468 publication_status: published publisher: IOP Publishing quality_controlled: '1' status: public title: 'Disentanglement approach to quantum spin ground states: Field theory and stochastic simulation' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 2021 year: '2021' ... --- _id: '9224' abstract: - lang: eng text: We re-examine attempts to study the many-body localization transition using measures that are physically natural on the ergodic/quantum chaotic regime of the phase diagram. Using simple scaling arguments and an analysis of various models for which rigorous results are available, we find that these measures can be particularly adversely affected by the strong finite-size effects observed in nearly all numerical studies of many-body localization. This severely impacts their utility in probing the transition and the localized phase. In light of this analysis, we discuss a recent study (Šuntajs et al., 2020) of the behaviour of the Thouless energy and level repulsion in disordered spin chains, and its implications for the question of whether MBL is a true phase of matter. article_number: '168415' article_processing_charge: No article_type: original author: - first_name: D. A. full_name: Abanin, D. A. last_name: Abanin - first_name: J. H. full_name: Bardarson, J. H. last_name: Bardarson - first_name: G. full_name: De Tomasi, G. last_name: De Tomasi - first_name: S. full_name: Gopalakrishnan, S. last_name: Gopalakrishnan - first_name: V. full_name: Khemani, V. last_name: Khemani - first_name: S. A. full_name: Parameswaran, S. A. last_name: Parameswaran - first_name: F. full_name: Pollmann, F. last_name: Pollmann - first_name: A. C. full_name: Potter, A. C. last_name: Potter - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: R. full_name: Vasseur, R. last_name: Vasseur citation: ama: 'Abanin DA, Bardarson JH, De Tomasi G, et al. Distinguishing localization from chaos: Challenges in finite-size systems. Annals of Physics. 2021;427(4). doi:10.1016/j.aop.2021.168415' apa: 'Abanin, D. A., Bardarson, J. H., De Tomasi, G., Gopalakrishnan, S., Khemani, V., Parameswaran, S. A., … Vasseur, R. (2021). Distinguishing localization from chaos: Challenges in finite-size systems. Annals of Physics. Elsevier. https://doi.org/10.1016/j.aop.2021.168415' chicago: 'Abanin, D. A., J. H. Bardarson, G. De Tomasi, S. Gopalakrishnan, V. Khemani, S. A. Parameswaran, F. Pollmann, A. C. Potter, Maksym Serbyn, and R. Vasseur. “Distinguishing Localization from Chaos: Challenges in Finite-Size Systems.” Annals of Physics. Elsevier, 2021. https://doi.org/10.1016/j.aop.2021.168415.' ieee: 'D. A. Abanin et al., “Distinguishing localization from chaos: Challenges in finite-size systems,” Annals of Physics, vol. 427, no. 4. Elsevier, 2021.' ista: 'Abanin DA, Bardarson JH, De Tomasi G, Gopalakrishnan S, Khemani V, Parameswaran SA, Pollmann F, Potter AC, Serbyn M, Vasseur R. 2021. Distinguishing localization from chaos: Challenges in finite-size systems. Annals of Physics. 427(4), 168415.' mla: 'Abanin, D. A., et al. “Distinguishing Localization from Chaos: Challenges in Finite-Size Systems.” Annals of Physics, vol. 427, no. 4, 168415, Elsevier, 2021, doi:10.1016/j.aop.2021.168415.' short: D.A. Abanin, J.H. Bardarson, G. De Tomasi, S. Gopalakrishnan, V. Khemani, S.A. Parameswaran, F. Pollmann, A.C. Potter, M. Serbyn, R. Vasseur, Annals of Physics 427 (2021). date_created: 2021-03-07T23:01:25Z date_published: 2021-04-01T00:00:00Z date_updated: 2023-08-07T13:58:30Z day: '01' department: - _id: MaSe doi: 10.1016/j.aop.2021.168415 external_id: arxiv: - '1911.04501' isi: - '000634879800007' intvolume: ' 427' isi: 1 issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1911.04501 month: '04' oa: 1 oa_version: Preprint publication: Annals of Physics publication_identifier: eissn: - 1096035X issn: - '00034916' publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: 'Distinguishing localization from chaos: Challenges in finite-size systems' type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 427 year: '2021' ... --- _id: '9618' abstract: - lang: eng text: The control of nonequilibrium quantum dynamics in many-body systems is challenging because interactions typically lead to thermalization and a chaotic spreading throughout Hilbert space. We investigate nonequilibrium dynamics after rapid quenches in a many-body system composed of 3 to 200 strongly interacting qubits in one and two spatial dimensions. Using a programmable quantum simulator based on Rydberg atom arrays, we show that coherent revivals associated with so-called quantum many-body scars can be stabilized by periodic driving, which generates a robust subharmonic response akin to discrete time-crystalline order. We map Hilbert space dynamics, geometry dependence, phase diagrams, and system-size dependence of this emergent phenomenon, demonstrating new ways to steer complex dynamics in many-body systems and enabling potential applications in quantum information science. acknowledgement: 'We thank many members of the Harvard AMO community, particularly E. Urbach, S. Dakoulas, and J. Doyle for their efforts enabling safe and productive operation of our laboratories during 2020. We thank D. Abanin, I. Cong, F. Machado, H. Pichler, N. Yao, B. Ye, and H. Zhou for stimulating discussions. Funding: We acknowledge financial support from the Center for Ultracold Atoms, the National Science Foundation, the Vannevar Bush Faculty Fellowship, the U.S. Department of Energy (LBNL QSA Center and grant no. DE-SC0021013), the Office of Naval Research, the Army Research Office MURI, the DARPA DRINQS program (grant no. D18AC00033), and the DARPA ONISQ program (grant no. W911NF2010021). The authors acknowledge support from the NSF Graduate Research Fellowship Program (grant DGE1745303) and The Fannie and John Hertz Foundation (D.B.); a National Defense Science and Engineering Graduate (NDSEG) fellowship (H.L.); a fellowship from the Max Planck/Harvard Research Center for Quantum Optics (G.S.); Gordon College (T.T.W.); the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement no. 850899) (A.A.M. and M.S.); a Department of Energy Computational Science Graduate Fellowship under award number DE-SC0021110 (N.M.); the Moore Foundation’s EPiQS Initiative grant no. GBMF4306, the NUS Development grant AY2019/2020, and the Stanford Institute of Theoretical Physics (W.W.H.); and the Miller Institute for Basic Research in Science (S.C.). Author contributions: D.B., A.O., H.L., A.K., G.S., S.E., and T.T.W. contributed to the building of the experimental setup, performed the measurements, and analyzed the data. A.A.M., N.M., W.W.H., S.C., and M.S. performed theoretical analysis. All work was supervised by M.G., V.V., and M.D.L. All authors discussed the results and contributed to the manuscript. Competing interests: M.G., V.V., and M.D.L. are co-founders and shareholders of QuEra Computing. A.O. is a shareholder of QuEra Computing. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and the supplementary materials.' article_processing_charge: No article_type: original author: - first_name: D. full_name: Bluvstein, D. last_name: Bluvstein - first_name: A. full_name: Omran, A. last_name: Omran - first_name: H. full_name: Levine, H. last_name: Levine - first_name: A. full_name: Keesling, A. last_name: Keesling - first_name: G. full_name: Semeghini, G. last_name: Semeghini - first_name: S. full_name: Ebadi, S. last_name: Ebadi - first_name: T. T. full_name: Wang, T. T. last_name: Wang - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: N. full_name: Maskara, N. last_name: Maskara - first_name: W. W. full_name: Ho, W. W. last_name: Ho - first_name: S. full_name: Choi, S. last_name: Choi - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: M. full_name: Greiner, M. last_name: Greiner - first_name: V. full_name: Vuletić, V. last_name: Vuletić - first_name: M. D. full_name: Lukin, M. D. last_name: Lukin citation: ama: Bluvstein D, Omran A, Levine H, et al. Controlling quantum many-body dynamics in driven Rydberg atom arrays. Science. 2021;371(6536):1355-1359. doi:10.1126/science.abg2530 apa: Bluvstein, D., Omran, A., Levine, H., Keesling, A., Semeghini, G., Ebadi, S., … Lukin, M. D. (2021). Controlling quantum many-body dynamics in driven Rydberg atom arrays. Science. AAAS. https://doi.org/10.1126/science.abg2530 chicago: Bluvstein, D., A. Omran, H. Levine, A. Keesling, G. Semeghini, S. Ebadi, T. T. Wang, et al. “Controlling Quantum Many-Body Dynamics in Driven Rydberg Atom Arrays.” Science. AAAS, 2021. https://doi.org/10.1126/science.abg2530. ieee: D. Bluvstein et al., “Controlling quantum many-body dynamics in driven Rydberg atom arrays,” Science, vol. 371, no. 6536. AAAS, pp. 1355–1359, 2021. ista: Bluvstein D, Omran A, Levine H, Keesling A, Semeghini G, Ebadi S, Wang TT, Michailidis A, Maskara N, Ho WW, Choi S, Serbyn M, Greiner M, Vuletić V, Lukin MD. 2021. Controlling quantum many-body dynamics in driven Rydberg atom arrays. Science. 371(6536), 1355–1359. mla: Bluvstein, D., et al. “Controlling Quantum Many-Body Dynamics in Driven Rydberg Atom Arrays.” Science, vol. 371, no. 6536, AAAS, 2021, pp. 1355–59, doi:10.1126/science.abg2530. short: D. Bluvstein, A. Omran, H. Levine, A. Keesling, G. Semeghini, S. Ebadi, T.T. Wang, A. Michailidis, N. Maskara, W.W. Ho, S. Choi, M. Serbyn, M. Greiner, V. Vuletić, M.D. Lukin, Science 371 (2021) 1355–1359. date_created: 2021-06-29T12:04:05Z date_published: 2021-03-26T00:00:00Z date_updated: 2023-08-10T13:57:07Z day: '26' ddc: - '539' department: - _id: MaSe doi: 10.1126/science.abg2530 ec_funded: 1 external_id: arxiv: - '2012.12276' isi: - '000636043400048' pmid: - '33632894' file: - access_level: open_access checksum: 0b356fd10ab9bb95177d4c047d4e9c1a content_type: application/pdf creator: patrickd date_created: 2021-09-23T14:00:05Z date_updated: 2021-09-23T14:00:05Z file_id: '10040' file_name: scars_subharmonic_combined_manuscript_2_11_2021 (2)-1.pdf file_size: 3671159 relation: main_file success: 1 file_date_updated: 2021-09-23T14:00:05Z has_accepted_license: '1' intvolume: ' 371' isi: 1 issue: '6536' keyword: - Multidisciplinary language: - iso: eng month: '03' oa: 1 oa_version: Preprint page: 1355-1359 pmid: 1 project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Science publication_identifier: eissn: - 1095-9203 issn: - 0036-8075 publication_status: published publisher: AAAS quality_controlled: '1' scopus_import: '1' status: public title: Controlling quantum many-body dynamics in driven Rydberg atom arrays type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 371 year: '2021' ... --- _id: '9903' abstract: - lang: eng text: Eigenstate thermalization in quantum many-body systems implies that eigenstates at high energy are similar to random vectors. Identifying systems where at least some eigenstates are nonthermal is an outstanding question. In this Letter we show that interacting quantum models that have a nullspace—a degenerate subspace of eigenstates at zero energy (zero modes), which corresponds to infinite temperature, provide a route to nonthermal eigenstates. We analytically show the existence of a zero mode which can be represented as a matrix product state for a certain class of local Hamiltonians. In the more general case we use a subspace disentangling algorithm to generate an orthogonal basis of zero modes characterized by increasing entanglement entropy. We show evidence for an area-law entanglement scaling of the least-entangled zero mode in the broad parameter regime, leading to a conjecture that all local Hamiltonians with the nullspace feature zero modes with area-law entanglement scaling and, as such, break the strong thermalization hypothesis. Finally, we find zero modes in constrained models and propose a setup for observing their experimental signatures. acknowledgement: "We acknowledge useful discussions with V. Gritsev and A. Garkun and suggestions on implementation of the\r\nPPXPP model by D. Bluvstein. A. M. and M. S. were supported by the European Research Council (ERC) under\r\nthe European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899)" article_number: '060602' article_processing_charge: Yes (in subscription journal) article_type: letter_note author: - first_name: Volker full_name: Karle, Volker id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425 last_name: Karle orcid: 0000-0002-6963-0129 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 citation: ama: Karle V, Serbyn M, Michailidis A. Area-law entangled eigenstates from nullspaces of local Hamiltonians. Physical Review Letters. 2021;127(6). doi:10.1103/physrevlett.127.060602 apa: Karle, V., Serbyn, M., & Michailidis, A. (2021). Area-law entangled eigenstates from nullspaces of local Hamiltonians. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.127.060602 chicago: Karle, Volker, Maksym Serbyn, and Alexios Michailidis. “Area-Law Entangled Eigenstates from Nullspaces of Local Hamiltonians.” Physical Review Letters. American Physical Society, 2021. https://doi.org/10.1103/physrevlett.127.060602. ieee: V. Karle, M. Serbyn, and A. Michailidis, “Area-law entangled eigenstates from nullspaces of local Hamiltonians,” Physical Review Letters, vol. 127, no. 6. American Physical Society, 2021. ista: Karle V, Serbyn M, Michailidis A. 2021. Area-law entangled eigenstates from nullspaces of local Hamiltonians. Physical Review Letters. 127(6), 060602. mla: Karle, Volker, et al. “Area-Law Entangled Eigenstates from Nullspaces of Local Hamiltonians.” Physical Review Letters, vol. 127, no. 6, 060602, American Physical Society, 2021, doi:10.1103/physrevlett.127.060602. short: V. Karle, M. Serbyn, A. Michailidis, Physical Review Letters 127 (2021). date_created: 2021-08-13T09:27:39Z date_published: 2021-08-06T00:00:00Z date_updated: 2023-08-11T10:43:27Z day: '06' ddc: - '539' department: - _id: MaSe - _id: GradSch - _id: MiLe doi: 10.1103/physrevlett.127.060602 ec_funded: 1 external_id: arxiv: - '2102.13633' isi: - '000684276000002' file: - access_level: open_access checksum: 51218f302dcef99d90d1209809fcc874 content_type: application/pdf creator: mserbyn date_created: 2021-08-13T09:28:08Z date_updated: 2021-08-13T09:28:08Z file_id: '9904' file_name: PhysRevLett.127.060602_SOM.pdf file_size: 5064231 relation: main_file success: 1 file_date_updated: 2021-08-13T09:28:08Z has_accepted_license: '1' intvolume: ' 127' isi: 1 issue: '6' language: - iso: eng month: '08' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Area-law entangled eigenstates from nullspaces of local Hamiltonians tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 127 year: '2021' ... --- _id: '9981' abstract: - lang: eng text: "The numerical simulation of dynamical phenomena in interacting quantum systems is a notoriously hard problem. Although a number of promising numerical methods exist, they often have limited applicability due to the growth of entanglement or the presence of the so-called sign problem. In this work, we develop an importance sampling scheme for the simulation of quantum spin dynamics, building on a recent approach mapping quantum spin systems to classical stochastic processes. The importance sampling scheme is based on identifying the classical trajectory that yields the largest contribution to a given quantum observable. An exact transformation is then carried out to preferentially sample trajectories that are close to the dominant one. We demonstrate that this approach is capable of reducing the temporal growth of fluctuations in the stochastic quantities, thus extending the range of accessible times and system sizes compared to direct sampling. We discuss advantages and limitations of the proposed approach, outlining directions\r\nfor further developments." article_number: '048' article_processing_charge: No article_type: original author: - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 citation: ama: De Nicola S. Importance sampling scheme for the stochastic simulation of quantum spin dynamics. SciPost Physics. 2021;11(3). doi:10.21468/scipostphys.11.3.048 apa: De Nicola, S. (2021). Importance sampling scheme for the stochastic simulation of quantum spin dynamics. SciPost Physics. SciPost. https://doi.org/10.21468/scipostphys.11.3.048 chicago: De Nicola, Stefano. “Importance Sampling Scheme for the Stochastic Simulation of Quantum Spin Dynamics.” SciPost Physics. SciPost, 2021. https://doi.org/10.21468/scipostphys.11.3.048. ieee: S. De Nicola, “Importance sampling scheme for the stochastic simulation of quantum spin dynamics,” SciPost Physics, vol. 11, no. 3. SciPost, 2021. ista: De Nicola S. 2021. Importance sampling scheme for the stochastic simulation of quantum spin dynamics. SciPost Physics. 11(3), 048. mla: De Nicola, Stefano. “Importance Sampling Scheme for the Stochastic Simulation of Quantum Spin Dynamics.” SciPost Physics, vol. 11, no. 3, 048, SciPost, 2021, doi:10.21468/scipostphys.11.3.048. short: S. De Nicola, SciPost Physics 11 (2021). date_created: 2021-09-02T11:49:47Z date_published: 2021-09-02T00:00:00Z date_updated: 2023-08-11T10:59:29Z day: '02' ddc: - '519' department: - _id: MaSe doi: 10.21468/scipostphys.11.3.048 ec_funded: 1 external_id: arxiv: - '2103.16468' isi: - '000692534200001' file: - access_level: open_access checksum: e4ec69d893e31811efc6093cb6ea8eb7 content_type: application/pdf creator: cchlebak date_created: 2021-09-02T14:05:43Z date_updated: 2021-09-02T14:05:43Z file_id: '9984' file_name: 2021_SciPostPhys_DeNicola.pdf file_size: 373833 relation: main_file success: 1 file_date_updated: 2021-09-02T14:05:43Z has_accepted_license: '1' intvolume: ' 11' isi: 1 issue: '3' keyword: - General Physics and Astronomy language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: SciPost Physics publication_identifier: eissn: - 2666-9366 issn: - 2542-4653 publication_status: published publisher: SciPost quality_controlled: '1' status: public title: Importance sampling scheme for the stochastic simulation of quantum spin dynamics tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 11 year: '2021' ... --- _id: '9960' abstract: - lang: eng text: The control of many-body quantum dynamics in complex systems is a key challenge in the quest to reliably produce and manipulate large-scale quantum entangled states. Recently, quench experiments in Rydberg atom arrays [Bluvstein et al. Science 371, 1355 (2021)] demonstrated that coherent revivals associated with quantum many-body scars can be stabilized by periodic driving, generating stable subharmonic responses over a wide parameter regime. We analyze a simple, related model where these phenomena originate from spatiotemporal ordering in an effective Floquet unitary, corresponding to discrete time-crystalline behavior in a prethermal regime. Unlike conventional discrete time crystals, the subharmonic response exists only for Néel-like initial states, associated with quantum scars. We predict robustness to perturbations and identify emergent timescales that could be observed in future experiments. Our results suggest a route to controlling entanglement in interacting quantum systems by combining periodic driving with many-body scars. acknowledgement: We thank Dmitry Abanin, Ehud Altman, Iris Cong, Sepehr Ebadi, Alex Keesling, Harry Levine, Ahmed Omran, Hannes Pichler, Rhine Samajdar, Guilia Semeghini, Tout Wang, Norman Yao, and Harry Zhou or stimulating discussions. We acknowledge support from the Center for Ultracold Atoms, the National Science Foundation, the Vannevar Bush Faculty Fellowship, the U.S. Department of Energy, the Army Research Office MURI, and the DARPA ONISQ program (M. L., N. M, W. W. H., D. B.); the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programme Grant Agreement No. 850899 (A. M. and M. S.); the Department of Energy Computational Science Graduate Fellowship under Awards No. DESC0021110 (N. M.); the Moore Foundation EPiQS initiative Grant No. GBMF4306, the National University of Singapore (NUS) Development Grant AY2019/2020 and the Stanford Institute for Theoretical Physics (W. W. H.); the NSF Graduate Research Fellowship Program (Grant No. DGE1745303) and The Fannie and John Hertz Foundation (D. B.); the Miller Institute for Basic Research in Science (S. C.); DOE Quantum Systems Accelerator – Contract No. 7568717; and DOE Programmable Quantum Simulators for Lattice Gauge Theories and Gauge-Gravity Correspondence – Grant No. DE-SC0021013. article_number: '090602' article_processing_charge: No article_type: letter_note author: - first_name: N. full_name: Maskara, N. last_name: Maskara - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: W. W. full_name: Ho, W. W. last_name: Ho - first_name: D. full_name: Bluvstein, D. last_name: Bluvstein - first_name: S. full_name: Choi, S. last_name: Choi - first_name: M. D. full_name: Lukin, M. D. last_name: Lukin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: 'Maskara N, Michailidis A, Ho WW, et al. Discrete time-crystalline order enabled by quantum many-body scars: Entanglement steering via periodic driving. Physical Review Letters. 2021;127(9). doi:10.1103/PhysRevLett.127.090602' apa: 'Maskara, N., Michailidis, A., Ho, W. W., Bluvstein, D., Choi, S., Lukin, M. D., & Serbyn, M. (2021). Discrete time-crystalline order enabled by quantum many-body scars: Entanglement steering via periodic driving. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.127.090602' chicago: 'Maskara, N., Alexios Michailidis, W. W. Ho, D. Bluvstein, S. Choi, M. D. Lukin, and Maksym Serbyn. “Discrete Time-Crystalline Order Enabled by Quantum Many-Body Scars: Entanglement Steering via Periodic Driving.” Physical Review Letters. American Physical Society, 2021. https://doi.org/10.1103/PhysRevLett.127.090602.' ieee: 'N. Maskara et al., “Discrete time-crystalline order enabled by quantum many-body scars: Entanglement steering via periodic driving,” Physical Review Letters, vol. 127, no. 9. American Physical Society, 2021.' ista: 'Maskara N, Michailidis A, Ho WW, Bluvstein D, Choi S, Lukin MD, Serbyn M. 2021. Discrete time-crystalline order enabled by quantum many-body scars: Entanglement steering via periodic driving. Physical Review Letters. 127(9), 090602.' mla: 'Maskara, N., et al. “Discrete Time-Crystalline Order Enabled by Quantum Many-Body Scars: Entanglement Steering via Periodic Driving.” Physical Review Letters, vol. 127, no. 9, 090602, American Physical Society, 2021, doi:10.1103/PhysRevLett.127.090602.' short: N. Maskara, A. Michailidis, W.W. Ho, D. Bluvstein, S. Choi, M.D. Lukin, M. Serbyn, Physical Review Letters 127 (2021). date_created: 2021-08-28T08:08:58Z date_published: 2021-08-27T00:00:00Z date_updated: 2023-08-11T10:57:51Z day: '27' department: - _id: MaSe doi: 10.1103/PhysRevLett.127.090602 ec_funded: 1 external_id: arxiv: - '2102.13160' isi: - '000692200100002' intvolume: ' 127' isi: 1 issue: '9' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2102.13160 month: '08' oa: 1 oa_version: Submitted Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: 'Discrete time-crystalline order enabled by quantum many-body scars: Entanglement steering via periodic driving' type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 127 year: '2021' ... --- _id: '9961' abstract: - lang: eng text: The notion of Thouless energy plays a central role in the theory of Anderson localization. We investigate and compare the scaling of Thouless energy across the many-body localization (MBL) transition in a Floquet model. We use a combination of methods that are reliable on the ergodic side of the transition (e.g., spectral form factor) and methods that work on the MBL side (e.g., typical matrix elements of local operators) to obtain a complete picture of the Thouless energy behavior across the transition. On the ergodic side, Thouless energy decreases slowly with the system size, while at the transition it becomes comparable to the level spacing. Different probes yield consistent estimates of Thouless energy in their overlapping regime of applicability, giving the location of the transition point nearly free of finite-size drift. This work establishes a connection between different definitions of Thouless energy in a many-body setting and yields insights into the MBL transition in Floquet systems. acknowledgement: "We thank S. Garratt for useful comments on the manuscript. This work was supported by the Swiss National Science Foundation (M. Sonner and D.A.A.) and by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (M. Serbyn, Grant Agreement No. 850899, and D.A.A., Grant Agreement No. 864597). Z.P. acknowledges support from EPSRC Grant No. EP/R020612/1 and from Leverhulme Trust Research Leadership Award No. RL-2019-015. The computations were performed on the Baobab cluster of the University\r\nof Geneva." article_number: L081112 article_processing_charge: No article_type: letter_note author: - first_name: Michael full_name: Sonner, Michael last_name: Sonner - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin citation: ama: Sonner M, Serbyn M, Papić Z, Abanin DA. Thouless energy across the many-body localization transition in Floquet systems. Physical Review B. 2021;104(8). doi:10.1103/PhysRevB.104.L081112 apa: Sonner, M., Serbyn, M., Papić, Z., & Abanin, D. A. (2021). Thouless energy across the many-body localization transition in Floquet systems. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.104.L081112 chicago: Sonner, Michael, Maksym Serbyn, Zlatko Papić, and Dmitry A. Abanin. “Thouless Energy across the Many-Body Localization Transition in Floquet Systems.” Physical Review B. American Physical Society, 2021. https://doi.org/10.1103/PhysRevB.104.L081112. ieee: M. Sonner, M. Serbyn, Z. Papić, and D. A. Abanin, “Thouless energy across the many-body localization transition in Floquet systems,” Physical Review B, vol. 104, no. 8. American Physical Society, 2021. ista: Sonner M, Serbyn M, Papić Z, Abanin DA. 2021. Thouless energy across the many-body localization transition in Floquet systems. Physical Review B. 104(8), L081112. mla: Sonner, Michael, et al. “Thouless Energy across the Many-Body Localization Transition in Floquet Systems.” Physical Review B, vol. 104, no. 8, L081112, American Physical Society, 2021, doi:10.1103/PhysRevB.104.L081112. short: M. Sonner, M. Serbyn, Z. Papić, D.A. Abanin, Physical Review B 104 (2021). date_created: 2021-08-28T16:44:55Z date_published: 2021-08-15T00:00:00Z date_updated: 2023-08-11T10:57:09Z day: '15' department: - _id: MaSe doi: 10.1103/PhysRevB.104.L081112 ec_funded: 1 external_id: arxiv: - '2012.15676' isi: - '000689734500009' intvolume: ' 104' isi: 1 issue: '8' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2012.15676 month: '08' oa: 1 oa_version: Submitted Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Thouless energy across the many-body localization transition in Floquet systems type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 104 year: '2021' ... --- _id: '10025' abstract: - lang: eng text: Ferromagnetism is most common in transition metal compounds but may also arise in low-density two-dimensional electron systems, with signatures observed in silicon, III-V semiconductor systems, and graphene moiré heterostructures. Here we show that gate-tuned van Hove singularities in rhombohedral trilayer graphene drive the spontaneous ferromagnetic polarization of the electron system into one or more spin- and valley flavors. Using capacitance measurements on graphite-gated van der Waals heterostructures, we find a cascade of density- and electronic displacement field tuned phase transitions marked by negative electronic compressibility. The transitions define the boundaries between phases where quantum oscillations have either four-fold, two-fold, or one-fold degeneracy, associated with a spin and valley degenerate normal metal, spin-polarized `half-metal', and spin and valley polarized `quarter metal', respectively. For electron doping, the salient features are well captured by a phenomenological Stoner model with a valley-anisotropic Hund's coupling, likely arising from interactions at the lattice scale. For hole filling, we observe a richer phase diagram featuring a delicate interplay of broken symmetries and transitions in the Fermi surface topology. Finally, by rotational alignment of a hexagonal boron nitride substrate to induce a moiré superlattice, we find that the superlattice perturbs the preexisting isospin order only weakly, leaving the basic phase diagram intact while catalyzing the formation of topologically nontrivial gapped states whenever itinerant half- or quarter metal states occur at half- or quarter superlattice band filling. Our results show that rhombohedral trilayer graphene is an ideal platform for well-controlled tests of many-body theory and reveal magnetism in moiré materials to be fundamentally itinerant in nature. acknowledgement: "The authors acknowledge discussions with A. Macdonald, L. Fu, F. Wang and M. Zaletel. AFY acknowledges support of the National Science Foundation under DMR1654186, and the Gordon and Betty Moore Foundation under award GBMF9471. The authors acknowledge the use of the research facilities within the California NanoSystems Institute, supported by the University of California, Santa Barbara and the University of California, Office of the President.\r\nK.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, Grant Number JPMXP0112101001 and JSPS KAKENHI, Grant Number JP20H00354. EB and TH were supported by the European Research Council (ERC) under grant HQMAT (Grant Agreement No. 817799). A.G. acknowledges support by the European Unions Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement\r\nNo. 754411.\r\n" article_processing_charge: No article_type: original author: - first_name: Haoxin full_name: Zhou, Haoxin last_name: Zhou - first_name: Tian full_name: Xie, Tian last_name: Xie - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Tobias full_name: Holder, Tobias last_name: Holder - first_name: James R. full_name: Ehrets, James R. last_name: Ehrets - first_name: Eric M. full_name: Spanton, Eric M. last_name: Spanton - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Erez full_name: Berg, Erez last_name: Berg - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Andrea F. full_name: Young, Andrea F. last_name: Young citation: ama: Zhou H, Xie T, Ghazaryan A, et al. Half and quarter metals in rhombohedral trilayer graphene. Nature. 2021. doi:10.1038/s41586-021-03938-w apa: Zhou, H., Xie, T., Ghazaryan, A., Holder, T., Ehrets, J. R., Spanton, E. M., … Young, A. F. (2021). Half and quarter metals in rhombohedral trilayer graphene. Nature. Springer Nature. https://doi.org/10.1038/s41586-021-03938-w chicago: Zhou, Haoxin, Tian Xie, Areg Ghazaryan, Tobias Holder, James R. Ehrets, Eric M. Spanton, Takashi Taniguchi, et al. “Half and Quarter Metals in Rhombohedral Trilayer Graphene.” Nature. Springer Nature, 2021. https://doi.org/10.1038/s41586-021-03938-w. ieee: H. Zhou et al., “Half and quarter metals in rhombohedral trilayer graphene,” Nature. Springer Nature, 2021. ista: Zhou H, Xie T, Ghazaryan A, Holder T, Ehrets JR, Spanton EM, Taniguchi T, Watanabe K, Berg E, Serbyn M, Young AF. 2021. Half and quarter metals in rhombohedral trilayer graphene. Nature. mla: Zhou, Haoxin, et al. “Half and Quarter Metals in Rhombohedral Trilayer Graphene.” Nature, Springer Nature, 2021, doi:10.1038/s41586-021-03938-w. short: H. Zhou, T. Xie, A. Ghazaryan, T. Holder, J.R. Ehrets, E.M. Spanton, T. Taniguchi, K. Watanabe, E. Berg, M. Serbyn, A.F. Young, Nature (2021). date_created: 2021-09-19T22:01:25Z date_published: 2021-09-01T00:00:00Z date_updated: 2023-08-14T07:04:06Z day: '01' department: - _id: MaSe - _id: MiLe doi: 10.1038/s41586-021-03938-w ec_funded: 1 external_id: arxiv: - '2104.00653' isi: - '000706977400002' isi: 1 keyword: - condensed matter - mesoscale and nanoscale physics - condensed matter - strongly correlated electrons - multidisciplinary language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2104.00653 month: '09' oa: 1 oa_version: Preprint project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Nature publication_identifier: eissn: - 1476-4687 issn: - 0028-0836 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - relation: erratum url: https://doi.org/10.1038/s41586-021-04181-z scopus_import: '1' status: public title: Half and quarter metals in rhombohedral trilayer graphene type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 year: '2021' ... --- _id: '10067' abstract: - lang: eng text: The search for novel entangled phases of matter has lead to the recent discovery of a new class of “entanglement transitions,” exemplified by random tensor networks and monitored quantum circuits. Most known examples can be understood as some classical ordering transitions in an underlying statistical mechanics model, where entanglement maps onto the free-energy cost of inserting a domain wall. In this paper we study the possibility of entanglement transitions driven by physics beyond such statistical mechanics mappings. Motivated by recent applications of neural-network-inspired variational Ansätze, we investigate under what conditions on the variational parameters these Ansätze can capture an entanglement transition. We study the entanglement scaling of short-range restricted Boltzmann machine (RBM) quantum states with random phases. For uncorrelated random phases, we analytically demonstrate the absence of an entanglement transition and reveal subtle finite-size effects in finite-size numerical simulations. Introducing phases with correlations decaying as 1/r^α in real space, we observe three regions with a different scaling of entanglement entropy depending on the exponent α. We study the nature of the transition between these regions, finding numerical evidence for critical behavior. Our work establishes the presence of long-range correlated phases in RBM-based wave functions as a required ingredient for entanglement transitions. acknowledgement: We would like to thank S. De Nicola, P. Brighi, and V. Karle for fruitful discussions and valuable feedback on the manuscript. R.M. and M.S. acknowledge support by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 850899). R.V. acknowledges support from the US Department of Energy, Office of Science, Basic Energy Sciences, under Early Career Award No. DE-SC0019168, and the Alfred P. Sloan Foundation through a Sloan Research Fellowship. article_number: '104205' article_processing_charge: No article_type: original author: - first_name: Raimel A full_name: Medina Ramos, Raimel A id: CE680B90-D85A-11E9-B684-C920E6697425 last_name: Medina Ramos orcid: 0000-0002-5383-2869 - first_name: Romain full_name: Vasseur, Romain last_name: Vasseur - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Medina Ramos RA, Vasseur R, Serbyn M. Entanglement transitions from restricted Boltzmann machines. Physical Review B. 2021;104(10). doi:10.1103/physrevb.104.104205 apa: Medina Ramos, R. A., Vasseur, R., & Serbyn, M. (2021). Entanglement transitions from restricted Boltzmann machines. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.104.104205 chicago: Medina Ramos, Raimel A, Romain Vasseur, and Maksym Serbyn. “Entanglement Transitions from Restricted Boltzmann Machines.” Physical Review B. American Physical Society, 2021. https://doi.org/10.1103/physrevb.104.104205. ieee: R. A. Medina Ramos, R. Vasseur, and M. Serbyn, “Entanglement transitions from restricted Boltzmann machines,” Physical Review B, vol. 104, no. 10. American Physical Society, 2021. ista: Medina Ramos RA, Vasseur R, Serbyn M. 2021. Entanglement transitions from restricted Boltzmann machines. Physical Review B. 104(10), 104205. mla: Medina Ramos, Raimel A., et al. “Entanglement Transitions from Restricted Boltzmann Machines.” Physical Review B, vol. 104, no. 10, 104205, American Physical Society, 2021, doi:10.1103/physrevb.104.104205. short: R.A. Medina Ramos, R. Vasseur, M. Serbyn, Physical Review B 104 (2021). date_created: 2021-10-02T09:03:42Z date_published: 2021-09-30T00:00:00Z date_updated: 2023-08-14T07:24:47Z day: '30' department: - _id: MaSe doi: 10.1103/physrevb.104.104205 ec_funded: 1 external_id: arxiv: - '2107.05735' isi: - '000704414400002' intvolume: ' 104' isi: 1 issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2107.05735 month: '09' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Entanglement transitions from restricted Boltzmann machines type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 104 year: '2021' ... --- _id: '10527' abstract: - lang: eng text: We show that in a two-dimensional electron gas with an annular Fermi surface, long-range Coulomb interactions can lead to unconventional superconductivity by the Kohn-Luttinger mechanism. Superconductivity is strongly enhanced when the inner and outer Fermi surfaces are close to each other. The most prevalent state has chiral p-wave symmetry, but d-wave and extended s-wave pairing are also possible. We discuss these results in the context of rhombohedral trilayer graphene, where superconductivity was recently discovered in regimes where the normal state has an annular Fermi surface. Using realistic parameters, our mechanism can account for the order of magnitude of Tc, as well as its trends as a function of electron density and perpendicular displacement field. Moreover, it naturally explains some of the outstanding puzzles in this material, that include the weak temperature dependence of the resistivity above Tc, and the proximity of spin singlet superconductivity to the ferromagnetic phase. acknowledgement: We thank Yang-Zhi Chou, Andrey Chubukov, Johannes Hofmann, Steve Kivelson, Sri Raghu, and Sankar das Sarma, Jay Sau, Fengcheng Wu, and Andrea Young for many stimulating discussions and for their comments on the manuscript. E.B. thanks S. Chatterjee, T. Wang, and M. Zaletel for a collaboration on a related topic. A.G. acknowledges support by the European Unions Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 754411. E.B. and T.H. were supported by the European Research Council (ERC) under grant HQMAT (Grant Agreement No. 817799), by the Israel-USA Binational Science Foundation (BSF), and by a Research grant from Irving and Cherna Moskowitz. article_number: '247001' article_processing_charge: No article_type: original author: - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Tobias full_name: Holder, Tobias last_name: Holder - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Erez full_name: Berg, Erez last_name: Berg citation: ama: 'Ghazaryan A, Holder T, Serbyn M, Berg E. Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene. Physical Review Letters. 2021;127(24). doi:10.1103/physrevlett.127.247001' apa: 'Ghazaryan, A., Holder, T., Serbyn, M., & Berg, E. (2021). Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.127.247001' chicago: 'Ghazaryan, Areg, Tobias Holder, Maksym Serbyn, and Erez Berg. “Unconventional Superconductivity in Systems with Annular Fermi Surfaces: Application to Rhombohedral Trilayer Graphene.” Physical Review Letters. American Physical Society, 2021. https://doi.org/10.1103/physrevlett.127.247001.' ieee: 'A. Ghazaryan, T. Holder, M. Serbyn, and E. Berg, “Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene,” Physical Review Letters, vol. 127, no. 24. American Physical Society, 2021.' ista: 'Ghazaryan A, Holder T, Serbyn M, Berg E. 2021. Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene. Physical Review Letters. 127(24), 247001.' mla: 'Ghazaryan, Areg, et al. “Unconventional Superconductivity in Systems with Annular Fermi Surfaces: Application to Rhombohedral Trilayer Graphene.” Physical Review Letters, vol. 127, no. 24, 247001, American Physical Society, 2021, doi:10.1103/physrevlett.127.247001.' short: A. Ghazaryan, T. Holder, M. Serbyn, E. Berg, Physical Review Letters 127 (2021). date_created: 2021-12-10T07:51:33Z date_published: 2021-12-09T00:00:00Z date_updated: 2023-08-14T13:19:13Z day: '09' department: - _id: MaSe doi: 10.1103/physrevlett.127.247001 ec_funded: 1 external_id: arxiv: - '2109.00011' isi: - '000923819400004' intvolume: ' 127' isi: 1 issue: '24' keyword: - general physics and astronomy language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2109.00011 month: '12' oa: 1 oa_version: Preprint project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: link: - description: News on IST Webpage relation: press_release url: https://ist.ac.at/en/news/resolving-the-puzzles-of-graphene-superconductivity/ scopus_import: '1' status: public title: 'Unconventional superconductivity in systems with annular Fermi surfaces: Application to rhombohedral trilayer graphene' type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 127 year: '2021' ... --- _id: '10545' abstract: - lang: eng text: Classical models with complex energy landscapes represent a perspective avenue for the near-term application of quantum simulators. Until now, many theoretical works studied the performance of quantum algorithms for models with a unique ground state. However, when the classical problem is in a so-called clustering phase, the ground state manifold is highly degenerate. As an example, we consider a 3-XORSAT model defined on simple hypergraphs. The degeneracy of classical ground state manifold translates into the emergence of an extensive number of Z2 symmetries, which remain intact even in the presence of a quantum transverse magnetic field. We establish a general duality approach that restricts the quantum problem to a given sector of conserved Z2 charges and use it to study how the outcome of the quantum adiabatic algorithm depends on the hypergraph geometry. We show that the tree hypergraph which corresponds to a classically solvable instance of the 3-XORSAT problem features a constant gap, whereas the closed hypergraph encounters a second-order phase transition with a gap vanishing as a power-law in the problem size. The duality developed in this work provides a practical tool for studies of quantum models with classically degenerate energy manifold and reveals potential connections between glasses and gauge theories. acknowledgement: We would like to thank S. De Nicola, A. Michaidilis, T. Gulden, Y. Nez-Fernndez, P. Brighi, and S. Sack for fruitful discussions and valuable feedback on the manuscript. M.S. acknowledges useful discussions with E. Altman, L. Cugliandolo, and C. Laumann. We acknowledge support from the European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme Grant Agreement No. 850899. article_number: '062423' article_processing_charge: No article_type: original author: - first_name: Raimel A full_name: Medina Ramos, Raimel A id: CE680B90-D85A-11E9-B684-C920E6697425 last_name: Medina Ramos orcid: 0000-0002-5383-2869 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Medina Ramos RA, Serbyn M. Duality approach to quantum annealing of the 3-variable exclusive-or satisfiability problem (3-XORSAT). Physical Review A. 2021;104(6). doi:10.1103/physreva.104.062423 apa: Medina Ramos, R. A., & Serbyn, M. (2021). Duality approach to quantum annealing of the 3-variable exclusive-or satisfiability problem (3-XORSAT). Physical Review A. American Physical Society. https://doi.org/10.1103/physreva.104.062423 chicago: Medina Ramos, Raimel A, and Maksym Serbyn. “Duality Approach to Quantum Annealing of the 3-Variable Exclusive-or Satisfiability Problem (3-XORSAT).” Physical Review A. American Physical Society, 2021. https://doi.org/10.1103/physreva.104.062423. ieee: R. A. Medina Ramos and M. Serbyn, “Duality approach to quantum annealing of the 3-variable exclusive-or satisfiability problem (3-XORSAT),” Physical Review A, vol. 104, no. 6. American Physical Society, 2021. ista: Medina Ramos RA, Serbyn M. 2021. Duality approach to quantum annealing of the 3-variable exclusive-or satisfiability problem (3-XORSAT). Physical Review A. 104(6), 062423. mla: Medina Ramos, Raimel A., and Maksym Serbyn. “Duality Approach to Quantum Annealing of the 3-Variable Exclusive-or Satisfiability Problem (3-XORSAT).” Physical Review A, vol. 104, no. 6, 062423, American Physical Society, 2021, doi:10.1103/physreva.104.062423. short: R.A. Medina Ramos, M. Serbyn, Physical Review A 104 (2021). date_created: 2021-12-14T20:46:07Z date_published: 2021-12-14T00:00:00Z date_updated: 2023-08-17T06:22:49Z day: '14' department: - _id: MaSe doi: 10.1103/physreva.104.062423 ec_funded: 1 external_id: arxiv: - '2106.06344' isi: - '000753659200004' intvolume: ' 104' isi: 1 issue: '6' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2106.06344 month: '12' oa: 1 oa_version: Preprint project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review A publication_identifier: eissn: - 2469-9934 issn: - 2469-9926 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Duality approach to quantum annealing of the 3-variable exclusive-or satisfiability problem (3-XORSAT) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 104 year: '2021' ... --- _id: '9048' abstract: - lang: eng text: The analogy between an equilibrium partition function and the return probability in many-body unitary dynamics has led to the concept of dynamical quantum phase transition (DQPT). DQPTs are defined by nonanalyticities in the return amplitude and are present in many models. In some cases, DQPTs can be related to equilibrium concepts, such as order parameters, yet their universal description is an open question. In this Letter, we provide first steps toward a classification of DQPTs by using a matrix product state description of unitary dynamics in the thermodynamic limit. This allows us to distinguish the two limiting cases of “precession” and “entanglement” DQPTs, which are illustrated using an analytical description in the quantum Ising model. While precession DQPTs are characterized by a large entanglement gap and are semiclassical in their nature, entanglement DQPTs occur near avoided crossings in the entanglement spectrum and can be distinguished by a complex pattern of nonlocal correlations. We demonstrate the existence of precession and entanglement DQPTs beyond Ising models, discuss observables that can distinguish them, and relate their interplay to complex DQPT phenomenology. acknowledgement: "S. D. N. acknowledges funding from the Institute of Science and Technology (IST) Austria and from the European Union’s Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie Grant Agreement No. 754411. A. M. and M. S. were supported by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and\r\nInnovation Programme (Grant Agreement No. 850899)." article_number: '040602' article_processing_charge: Yes article_type: original author: - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: De Nicola S, Michailidis A, Serbyn M. Entanglement view of dynamical quantum phase transitions. Physical Review Letters. 2021;126(4). doi:10.1103/physrevlett.126.040602 apa: De Nicola, S., Michailidis, A., & Serbyn, M. (2021). Entanglement view of dynamical quantum phase transitions. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.126.040602 chicago: De Nicola, Stefano, Alexios Michailidis, and Maksym Serbyn. “Entanglement View of Dynamical Quantum Phase Transitions.” Physical Review Letters. American Physical Society, 2021. https://doi.org/10.1103/physrevlett.126.040602. ieee: S. De Nicola, A. Michailidis, and M. Serbyn, “Entanglement view of dynamical quantum phase transitions,” Physical Review Letters, vol. 126, no. 4. American Physical Society, 2021. ista: De Nicola S, Michailidis A, Serbyn M. 2021. Entanglement view of dynamical quantum phase transitions. Physical Review Letters. 126(4), 040602. mla: De Nicola, Stefano, et al. “Entanglement View of Dynamical Quantum Phase Transitions.” Physical Review Letters, vol. 126, no. 4, 040602, American Physical Society, 2021, doi:10.1103/physrevlett.126.040602. short: S. De Nicola, A. Michailidis, M. Serbyn, Physical Review Letters 126 (2021). date_created: 2021-02-01T09:20:00Z date_published: 2021-01-29T00:00:00Z date_updated: 2023-09-05T12:08:58Z day: '29' ddc: - '530' department: - _id: MaSe doi: 10.1103/physrevlett.126.040602 ec_funded: 1 external_id: arxiv: - '2008.04894' isi: - '000613148200001' file: - access_level: open_access checksum: d9acbc502390ed7a97e631d23ae19ecd content_type: application/pdf creator: dernst date_created: 2021-02-03T12:47:04Z date_updated: 2021-02-03T12:47:04Z file_id: '9074' file_name: 2021_PhysicalRevLett_DeNicola.pdf file_size: 398075 relation: main_file success: 1 file_date_updated: 2021-02-03T12:47:04Z has_accepted_license: '1' intvolume: ' 126' isi: 1 issue: '4' keyword: - General Physics and Astronomy language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Entanglement view of dynamical quantum phase transitions tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 126 year: '2021' ... --- _id: '9760' abstract: - lang: eng text: "The quantum approximate optimization algorithm (QAOA) is a prospective near-term quantum algorithm due to its modest circuit depth and promising benchmarks. However, an external parameter optimization required in the QAOA could become a performance bottleneck. This motivates studies of the optimization landscape and search for heuristic ways of parameter initialization. In this work we visualize the optimization landscape of the QAOA applied to the MaxCut problem on random graphs, demonstrating that random initialization of the QAOA is prone to converging to local minima with suboptimal performance. We introduce the initialization of QAOA parameters based on the Trotterized quantum annealing (TQA) protocol, parameterized by the Trotter time step. We find that the TQA initialization allows to circumvent\r\nthe issue of false minima for a broad range of time steps, yielding the same performance as the best result out of an exponentially scaling number of random initializations. Moreover, we demonstrate that the optimal value of the time step coincides with the point of proliferation of Trotter errors in quantum annealing. Our results suggest practical ways of initializing QAOA protocols on near-term quantum devices and reveal new connections between QAOA and quantum annealing." acknowledgement: We would like to thank D. Abanin and R. Medina for fruitful discussions and A. Smith and I. Kim for valuable feedback on the manuscript. We acknowledge support by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 850899). article_number: '491' article_processing_charge: Yes article_type: original author: - first_name: Stefan full_name: Sack, Stefan id: dd622248-f6e0-11ea-865d-ce382a1c81a5 last_name: Sack orcid: 0000-0001-5400-8508 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Sack S, Serbyn M. Quantum annealing initialization of the quantum approximate optimization algorithm. Quantum. 2021;5. doi:10.22331/Q-2021-07-01-491 apa: Sack, S., & Serbyn, M. (2021). Quantum annealing initialization of the quantum approximate optimization algorithm. Quantum. Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften. https://doi.org/10.22331/Q-2021-07-01-491 chicago: Sack, Stefan, and Maksym Serbyn. “Quantum Annealing Initialization of the Quantum Approximate Optimization Algorithm.” Quantum. Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2021. https://doi.org/10.22331/Q-2021-07-01-491. ieee: S. Sack and M. Serbyn, “Quantum annealing initialization of the quantum approximate optimization algorithm,” Quantum, vol. 5. Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2021. ista: Sack S, Serbyn M. 2021. Quantum annealing initialization of the quantum approximate optimization algorithm. Quantum. 5, 491. mla: Sack, Stefan, and Maksym Serbyn. “Quantum Annealing Initialization of the Quantum Approximate Optimization Algorithm.” Quantum, vol. 5, 491, Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften, 2021, doi:10.22331/Q-2021-07-01-491. short: S. Sack, M. Serbyn, Quantum 5 (2021). date_created: 2021-08-01T22:01:21Z date_published: 2021-07-01T00:00:00Z date_updated: 2023-12-13T14:47:25Z day: '01' ddc: - '530' department: - _id: GradSch - _id: MaSe doi: 10.22331/Q-2021-07-01-491 ec_funded: 1 external_id: arxiv: - '2101.05742' isi: - '000669830600001' file: - access_level: open_access checksum: 9706c2bb8e748e9b5b138381995a7f6f content_type: application/pdf creator: cchlebak date_created: 2021-08-06T06:44:31Z date_updated: 2021-08-06T06:44:31Z file_id: '9774' file_name: 2021_Quantum_Sack.pdf file_size: 2312482 relation: main_file file_date_updated: 2021-08-06T06:44:31Z has_accepted_license: '1' intvolume: ' 5' isi: 1 language: - iso: eng month: '07' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Quantum publication_identifier: eissn: - 2521-327X publication_status: published publisher: Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften quality_controlled: '1' related_material: record: - id: '14622' relation: dissertation_contains status: public scopus_import: '1' status: public title: Quantum annealing initialization of the quantum approximate optimization algorithm tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 5 year: '2021' ... --- _id: '10029' abstract: - lang: eng text: Superconductor-semiconductor hybrids are platforms for realizing effective p-wave superconductivity. Spin-orbit coupling, combined with the proximity effect, causes the two-dimensional semiconductor to inherit p±ip intraband pairing, and application of magnetic field can then result in transitions to the normal state, partial Bogoliubov Fermi surfaces, or topological phases with Majorana modes. Experimentally probing the hybrid superconductor-semiconductor interface is challenging due to the shunting effect of the conventional superconductor. Consequently, the nature of induced pairing remains an open question. Here, we use the circuit quantum electrodynamics architecture to probe induced superconductivity in a two dimensional Al-InAs hybrid system. We observe a strong suppression of superfluid density and enhanced dissipation driven by magnetic field, which cannot be accounted for by the depairing theory of an s-wave superconductor. These observations are explained by a picture of independent intraband p±ip superconductors giving way to partial Bogoliubov Fermi surfaces, and allow for the first characterization of key properties of the hybrid superconducting system. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility. JS and AG were supported by funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No.754411. article_number: '2107.03695' article_processing_charge: No author: - first_name: Duc T full_name: Phan, Duc T id: 29C8C0B4-F248-11E8-B48F-1D18A9856A87 last_name: Phan - first_name: Jorden L full_name: Senior, Jorden L id: 5479D234-2D30-11EA-89CC-40953DDC885E last_name: Senior orcid: 0000-0002-0672-9295 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: M. full_name: Hatefipour, M. last_name: Hatefipour - first_name: W. M. full_name: Strickland, W. M. last_name: Strickland - first_name: J. full_name: Shabani, J. last_name: Shabani - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Andrew P full_name: Higginbotham, Andrew P id: 4AD6785A-F248-11E8-B48F-1D18A9856A87 last_name: Higginbotham orcid: 0000-0003-2607-2363 citation: ama: Phan DT, Senior JL, Ghazaryan A, et al. Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv. apa: Phan, D. T., Senior, J. L., Ghazaryan, A., Hatefipour, M., Strickland, W. M., Shabani, J., … Higginbotham, A. P. (n.d.). Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv. chicago: Phan, Duc T, Jorden L Senior, Areg Ghazaryan, M. Hatefipour, W. M. Strickland, J. Shabani, Maksym Serbyn, and Andrew P Higginbotham. “Breakdown of Induced P±ip Pairing in a Superconductor-Semiconductor Hybrid.” ArXiv, n.d. ieee: D. T. Phan et al., “Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid,” arXiv. . ista: Phan DT, Senior JL, Ghazaryan A, Hatefipour M, Strickland WM, Shabani J, Serbyn M, Higginbotham AP. Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv, 2107.03695. mla: Phan, Duc T., et al. “Breakdown of Induced P±ip Pairing in a Superconductor-Semiconductor Hybrid.” ArXiv, 2107.03695. short: D.T. Phan, J.L. Senior, A. Ghazaryan, M. Hatefipour, W.M. Strickland, J. Shabani, M. Serbyn, A.P. Higginbotham, ArXiv (n.d.). date_created: 2021-09-21T08:41:02Z date_published: 2021-07-08T00:00:00Z date_updated: 2024-02-21T12:36:52Z day: '08' department: - _id: MaSe - _id: AnHi - _id: MiLe ec_funded: 1 external_id: arxiv: - '2107.03695' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2107.03695 month: '07' oa: 1 oa_version: Preprint project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: arXiv publication_status: submitted related_material: record: - id: '10851' relation: later_version status: public - id: '9636' relation: research_data status: public status: public title: Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2021' ... --- _id: '9428' abstract: - lang: eng text: Thermalization is the inevitable fate of many complex quantum systems, whose dynamics allow them to fully explore the vast configuration space regardless of the initial state---the behaviour known as quantum ergodicity. In a quest for experimental realizations of coherent long-time dynamics, efforts have focused on ergodicity-breaking mechanisms, such as integrability and localization. The recent discovery of persistent revivals in quantum simulators based on Rydberg atoms have pointed to the existence of a new type of behaviour where the system rapidly relaxes for most initial conditions, while certain initial states give rise to non-ergodic dynamics. This collective effect has been named ”quantum many-body scarring’by analogy with a related form of weak ergodicity breaking that occurs for a single particle inside a stadium billiard potential. In this Review, we provide a pedagogical introduction to quantum many-body scars and highlight the emerging connections with the semiclassical quantization of many-body systems. We discuss the relation between scars and more general routes towards weak violations of ergodicity due to embedded algebras and non-thermal eigenstates, and highlight possible applications of scars in quantum technology. acknowledgement: We thank our collaborators K. Bull, S. Choi, J.-Y. Desaules, W. W. Ho, A. Hudomal, M. Lukin, I. Martin, H. Pichler, N. Regnault, I. Vasić and in particular A. Michailidis and C. Turner, without whom this work would not have been possible. We also benefited from discussions with E. Altman, B. A. Bernevig, A. Chandran, P. Fendley, V. Khemani and L. Motrunich. M.S. was supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 850899). D.A.A. was supported by the Swiss National Science Foundation and by the ERC under the European Union’s Horizon 2020 research and innovation programme (grant agreement no. 864597). Z.P. acknowledges support by the Leverhulme Trust Research Leadership Award RL-2019-015. article_processing_charge: No article_type: review author: - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić citation: ama: Serbyn M, Abanin DA, Papić Z. Quantum many-body scars and weak breaking of ergodicity. Nature Physics. 2021;17(6):675–685. doi:10.1038/s41567-021-01230-2 apa: Serbyn, M., Abanin, D. A., & Papić, Z. (2021). Quantum many-body scars and weak breaking of ergodicity. Nature Physics. Nature Research. https://doi.org/10.1038/s41567-021-01230-2 chicago: Serbyn, Maksym, Dmitry A. Abanin, and Zlatko Papić. “Quantum Many-Body Scars and Weak Breaking of Ergodicity.” Nature Physics. Nature Research, 2021. https://doi.org/10.1038/s41567-021-01230-2. ieee: M. Serbyn, D. A. Abanin, and Z. Papić, “Quantum many-body scars and weak breaking of ergodicity,” Nature Physics, vol. 17, no. 6. Nature Research, pp. 675–685, 2021. ista: Serbyn M, Abanin DA, Papić Z. 2021. Quantum many-body scars and weak breaking of ergodicity. Nature Physics. 17(6), 675–685. mla: Serbyn, Maksym, et al. “Quantum Many-Body Scars and Weak Breaking of Ergodicity.” Nature Physics, vol. 17, no. 6, Nature Research, 2021, pp. 675–685, doi:10.1038/s41567-021-01230-2. short: M. Serbyn, D.A. Abanin, Z. Papić, Nature Physics 17 (2021) 675–685. date_created: 2021-05-28T09:03:50Z date_published: 2021-06-01T00:00:00Z date_updated: 2023-10-18T08:20:59Z day: '01' ddc: - '539' department: - _id: MaSe doi: 10.1038/s41567-021-01230-2 ec_funded: 1 external_id: arxiv: - '2011.09486' isi: - '000655563800002' file: - access_level: open_access checksum: 316ed42ea1b42b0f1a3025bb476266fc content_type: application/pdf creator: patrickd date_created: 2021-09-20T09:27:43Z date_updated: 2021-12-02T23:30:03Z embargo: 2021-12-01 file_id: '10026' file_name: RevisedQMBSreview.pdf file_size: 10028836 relation: main_file file_date_updated: 2021-12-02T23:30:03Z has_accepted_license: '1' intvolume: ' 17' isi: 1 issue: '6' language: - iso: eng month: '06' oa: 1 oa_version: Preprint page: 675–685 project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Nature Physics publication_identifier: eissn: - 1745-2481 publication_status: published publisher: Nature Research quality_controlled: '1' status: public title: Quantum many-body scars and weak breaking of ergodicity type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 17 year: '2021' ... --- _id: '8011' abstract: - lang: eng text: 'Relaxation to a thermal state is the inevitable fate of nonequilibrium interacting quantum systems without special conservation laws. While thermalization in one-dimensional systems can often be suppressed by integrability mechanisms, in two spatial dimensions thermalization is expected to be far more effective due to the increased phase space. In this work we propose a general framework for escaping or delaying the emergence of the thermal state in two-dimensional arrays of Rydberg atoms via the mechanism of quantum scars, i.e., initial states that fail to thermalize. The suppression of thermalization is achieved in two complementary ways: by adding local perturbations or by adjusting the driving Rabi frequency according to the local connectivity of the lattice. We demonstrate that these mechanisms allow us to realize robust quantum scars in various two-dimensional lattices, including decorated lattices with nonconstant connectivity. In particular, we show that a small decrease of the Rabi frequency at the corners of the lattice is crucial for mitigating the strong boundary effects in two-dimensional systems. Our results identify synchronization as an important tool for future experiments on two-dimensional quantum scars.' article_number: '022065' article_processing_charge: No article_type: original author: - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis - first_name: C. J. full_name: Turner, C. J. last_name: Turner - first_name: Z. full_name: Papić, Z. last_name: Papić - first_name: D. A. full_name: Abanin, D. A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Michailidis A, Turner CJ, Papić Z, Abanin DA, Serbyn M. Stabilizing two-dimensional quantum scars by deformation and synchronization. Physical Review Research. 2020;2(2). doi:10.1103/physrevresearch.2.022065 apa: Michailidis, A., Turner, C. J., Papić, Z., Abanin, D. A., & Serbyn, M. (2020). Stabilizing two-dimensional quantum scars by deformation and synchronization. Physical Review Research. American Physical Society. https://doi.org/10.1103/physrevresearch.2.022065 chicago: Michailidis, Alexios, C. J. Turner, Z. Papić, D. A. Abanin, and Maksym Serbyn. “Stabilizing Two-Dimensional Quantum Scars by Deformation and Synchronization.” Physical Review Research. American Physical Society, 2020. https://doi.org/10.1103/physrevresearch.2.022065. ieee: A. Michailidis, C. J. Turner, Z. Papić, D. A. Abanin, and M. Serbyn, “Stabilizing two-dimensional quantum scars by deformation and synchronization,” Physical Review Research, vol. 2, no. 2. American Physical Society, 2020. ista: Michailidis A, Turner CJ, Papić Z, Abanin DA, Serbyn M. 2020. Stabilizing two-dimensional quantum scars by deformation and synchronization. Physical Review Research. 2(2), 022065. mla: Michailidis, Alexios, et al. “Stabilizing Two-Dimensional Quantum Scars by Deformation and Synchronization.” Physical Review Research, vol. 2, no. 2, 022065, American Physical Society, 2020, doi:10.1103/physrevresearch.2.022065. short: A. Michailidis, C.J. Turner, Z. Papić, D.A. Abanin, M. Serbyn, Physical Review Research 2 (2020). date_created: 2020-06-23T12:00:19Z date_published: 2020-06-22T00:00:00Z date_updated: 2021-01-12T08:16:30Z day: '22' ddc: - '530' department: - _id: MaSe doi: 10.1103/physrevresearch.2.022065 ec_funded: 1 file: - access_level: open_access checksum: e6959dc8220f14a008d1933858795e6d content_type: application/pdf creator: dernst date_created: 2020-06-29T14:41:27Z date_updated: 2020-07-14T12:48:08Z file_id: '8050' file_name: 2020_PhysicalReviewResearch_Michailidis.pdf file_size: 2066011 relation: main_file file_date_updated: 2020-07-14T12:48:08Z has_accepted_license: '1' intvolume: ' 2' issue: '2' language: - iso: eng month: '06' oa: 1 oa_version: Published Version project: - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' status: public title: Stabilizing two-dimensional quantum scars by deformation and synchronization tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 2 year: '2020' ... --- _id: '7570' abstract: - lang: eng text: The relaxation of few-body quantum systems can strongly depend on the initial state when the system’s semiclassical phase space is mixed; i.e., regions of chaotic motion coexist with regular islands. In recent years, there has been much effort to understand the process of thermalization in strongly interacting quantum systems that often lack an obvious semiclassical limit. The time-dependent variational principle (TDVP) allows one to systematically derive an effective classical (nonlinear) dynamical system by projecting unitary many-body dynamics onto a manifold of weakly entangled variational states. We demonstrate that such dynamical systems generally possess mixed phase space. When TDVP errors are small, the mixed phase space leaves a footprint on the exact dynamics of the quantum model. For example, when the system is initialized in a state belonging to a stable periodic orbit or the surrounding regular region, it exhibits persistent many-body quantum revivals. As a proof of principle, we identify new types of “quantum many-body scars,” i.e., initial states that lead to long-time oscillations in a model of interacting Rydberg atoms in one and two dimensions. Intriguingly, the initial states that give rise to most robust revivals are typically entangled states. On the other hand, even when TDVP errors are large, as in the thermalizing tilted-field Ising model, initializing the system in a regular region of phase space leads to a surprising slowdown of thermalization. Our work establishes TDVP as a method for identifying interacting quantum systems with anomalous dynamics in arbitrary dimensions. Moreover, the mixed phase space classical variational equations allow one to find slowly thermalizing initial conditions in interacting models. Our results shed light on a link between classical and quantum chaos, pointing toward possible extensions of the classical Kolmogorov-Arnold-Moser theorem to quantum systems. article_number: '011055' article_processing_charge: No article_type: original author: - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: C. J. full_name: Turner, C. J. last_name: Turner - first_name: Z. full_name: Papić, Z. last_name: Papić - first_name: D. A. full_name: Abanin, D. A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Michailidis A, Turner CJ, Papić Z, Abanin DA, Serbyn M. Slow quantum thermalization and many-body revivals from mixed phase space. Physical Review X. 2020;10(1). doi:10.1103/physrevx.10.011055 apa: Michailidis, A., Turner, C. J., Papić, Z., Abanin, D. A., & Serbyn, M. (2020). Slow quantum thermalization and many-body revivals from mixed phase space. Physical Review X. American Physical Society. https://doi.org/10.1103/physrevx.10.011055 chicago: Michailidis, Alexios, C. J. Turner, Z. Papić, D. A. Abanin, and Maksym Serbyn. “Slow Quantum Thermalization and Many-Body Revivals from Mixed Phase Space.” Physical Review X. American Physical Society, 2020. https://doi.org/10.1103/physrevx.10.011055. ieee: A. Michailidis, C. J. Turner, Z. Papić, D. A. Abanin, and M. Serbyn, “Slow quantum thermalization and many-body revivals from mixed phase space,” Physical Review X, vol. 10, no. 1. American Physical Society, 2020. ista: Michailidis A, Turner CJ, Papić Z, Abanin DA, Serbyn M. 2020. Slow quantum thermalization and many-body revivals from mixed phase space. Physical Review X. 10(1), 011055. mla: Michailidis, Alexios, et al. “Slow Quantum Thermalization and Many-Body Revivals from Mixed Phase Space.” Physical Review X, vol. 10, no. 1, 011055, American Physical Society, 2020, doi:10.1103/physrevx.10.011055. short: A. Michailidis, C.J. Turner, Z. Papić, D.A. Abanin, M. Serbyn, Physical Review X 10 (2020). date_created: 2020-03-08T18:02:01Z date_published: 2020-03-04T00:00:00Z date_updated: 2023-08-18T07:01:07Z day: '04' ddc: - '530' department: - _id: MaSe doi: 10.1103/physrevx.10.011055 external_id: arxiv: - '1905.08564' isi: - '000517969300001' file: - access_level: open_access checksum: 4b3f2c13873d35230173c73d0e11c408 content_type: application/pdf creator: dernst date_created: 2020-03-12T12:13:07Z date_updated: 2020-07-14T12:48:00Z file_id: '7581' file_name: 2020_PhysicalReviewX_Michailidis.pdf file_size: 17828638 relation: main_file file_date_updated: 2020-07-14T12:48:00Z has_accepted_license: '1' intvolume: ' 10' isi: 1 issue: '1' language: - iso: eng month: '03' oa: 1 oa_version: Published Version publication: Physical Review X publication_identifier: issn: - 2160-3308 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/classical-physics-helps-predict-fate-of-interacting-quantum-systems/ scopus_import: '1' status: public title: Slow quantum thermalization and many-body revivals from mixed phase space tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 10 year: '2020' ... --- _id: '7638' abstract: - lang: eng text: Following on from our recent work, we investigate a stochastic approach to non-equilibrium quantum spin systems. We show how the method can be applied to a variety of physical observables and for different initial conditions. We provide exact formulae of broad applicability for the time-dependence of expectation values and correlation functions following a quantum quench in terms of averages over classical stochastic processes. We further explore the behavior of the classical stochastic variables in the presence of dynamical quantum phase transitions, including results for their distributions and correlation functions. We provide details on the numerical solution of the associated stochastic differential equations, and examine the growth of fluctuations in the classical description. We discuss the strengths and limitations of the current implementation of the stochastic approach and the potential for further development. article_number: '013106' article_processing_charge: No article_type: original author: - first_name: Stefano full_name: De Nicola, Stefano id: 42832B76-F248-11E8-B48F-1D18A9856A87 last_name: De Nicola orcid: 0000-0002-4842-6671 - first_name: B. full_name: Doyon, B. last_name: Doyon - first_name: M. J. full_name: Bhaseen, M. J. last_name: Bhaseen citation: ama: 'De Nicola S, Doyon B, Bhaseen MJ. Non-equilibrium quantum spin dynamics from classical stochastic processes. Journal of Statistical Mechanics: Theory and Experiment. 2020;2020(1). doi:10.1088/1742-5468/ab6093' apa: 'De Nicola, S., Doyon, B., & Bhaseen, M. J. (2020). Non-equilibrium quantum spin dynamics from classical stochastic processes. Journal of Statistical Mechanics: Theory and Experiment. IOP Publishing. https://doi.org/10.1088/1742-5468/ab6093' chicago: 'De Nicola, Stefano, B. Doyon, and M. J. Bhaseen. “Non-Equilibrium Quantum Spin Dynamics from Classical Stochastic Processes.” Journal of Statistical Mechanics: Theory and Experiment. IOP Publishing, 2020. https://doi.org/10.1088/1742-5468/ab6093.' ieee: 'S. De Nicola, B. Doyon, and M. J. Bhaseen, “Non-equilibrium quantum spin dynamics from classical stochastic processes,” Journal of Statistical Mechanics: Theory and Experiment, vol. 2020, no. 1. IOP Publishing, 2020.' ista: 'De Nicola S, Doyon B, Bhaseen MJ. 2020. Non-equilibrium quantum spin dynamics from classical stochastic processes. Journal of Statistical Mechanics: Theory and Experiment. 2020(1), 013106.' mla: 'De Nicola, Stefano, et al. “Non-Equilibrium Quantum Spin Dynamics from Classical Stochastic Processes.” Journal of Statistical Mechanics: Theory and Experiment, vol. 2020, no. 1, 013106, IOP Publishing, 2020, doi:10.1088/1742-5468/ab6093.' short: 'S. De Nicola, B. Doyon, M.J. Bhaseen, Journal of Statistical Mechanics: Theory and Experiment 2020 (2020).' date_created: 2020-04-05T22:00:50Z date_published: 2020-01-22T00:00:00Z date_updated: 2023-08-18T10:27:15Z day: '22' ddc: - '530' department: - _id: MaSe doi: 10.1088/1742-5468/ab6093 ec_funded: 1 external_id: arxiv: - '1909.13142' isi: - '000520187500001' file: - access_level: open_access checksum: 4030e683c15d30b7b4794ec7dc1b6537 content_type: application/pdf creator: dernst date_created: 2020-04-06T13:15:49Z date_updated: 2020-07-14T12:48:01Z file_id: '7648' file_name: 2020_JournStatisticalMech_DeNicola.pdf file_size: 3159026 relation: main_file file_date_updated: 2020-07-14T12:48:01Z has_accepted_license: '1' intvolume: ' 2020' isi: 1 issue: '1' language: - iso: eng month: '01' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: B67AFEDC-15C9-11EA-A837-991A96BB2854 name: IST Austria Open Access Fund publication: 'Journal of Statistical Mechanics: Theory and Experiment' publication_identifier: eissn: - '17425468' publication_status: published publisher: IOP Publishing quality_controlled: '1' scopus_import: '1' status: public title: Non-equilibrium quantum spin dynamics from classical stochastic processes type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 2020 year: '2020' ... --- _id: '8199' abstract: - lang: eng text: We investigate a mechanism to transiently stabilize topological phenomena in long-lived quasi-steady states of isolated quantum many-body systems driven at low frequencies. We obtain an analytical bound for the lifetime of the quasi-steady states which is exponentially large in the inverse driving frequency. Within this lifetime, the quasi-steady state is characterized by maximum entropy subject to the constraint of fixed number of particles in the system's Floquet-Bloch bands. In such a state, all the non-universal properties of these bands are washed out, hence only the topological properties persist. acknowledgement: "N.L., T.G. and E.B. acknowledge support from the European Research Council (ERC) under\r\nthe European Union Horizon 2020 Research and Innovation Programme (Grant Agreement\r\nNo. 639172). T.G. was in part supported by an Aly Kaufman Fellowship at the Technion. T.G.\r\nacknowledges funding from the Institute of Science and Technology (IST) Austria, and from\r\nthe European Union’s Horizon 2020 research and innovation programme under the Marie\r\nSkłodowska-Curie Grant Agreement No. 754411. N.L. acknowledges support from the People Programme (Marie Curie Actions) of the European Unions Seventh Framework 546 Programme (FP7/20072013), under REA Grant Agreement No. 631696, and by the Israeli Center\r\nof Research Excellence (I-CORE) Circle of Light funded by the Israel Science Foundation (Grant\r\nNo. 1802/12). M.R. gratefully acknowledges the support of the European Research Council\r\n(ERC) under the European Union Horizon 2020 Research and Innovation Programme (Grant\r\nAgreement No. 678862). M.R. acknowledges the support of the Villum Foundation. M.R. and\r\nE.B. acknowledge support from CRC 183 of the Deutsche Forschungsgemeinschaft" article_number: '015' article_processing_charge: No article_type: original author: - first_name: Tobias full_name: Gulden, Tobias id: 1083E038-9F73-11E9-A4B5-532AE6697425 last_name: Gulden orcid: 0000-0001-6814-7541 - first_name: Erez full_name: Berg, Erez last_name: Berg - first_name: Mark Spencer full_name: Rudner, Mark Spencer last_name: Rudner - first_name: Netanel full_name: Lindner, Netanel last_name: Lindner citation: ama: Gulden T, Berg E, Rudner MS, Lindner N. Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps. SciPost Physics. 2020;9. doi:10.21468/scipostphys.9.1.015 apa: Gulden, T., Berg, E., Rudner, M. S., & Lindner, N. (2020). Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps. SciPost Physics. SciPost Foundation. https://doi.org/10.21468/scipostphys.9.1.015 chicago: Gulden, Tobias, Erez Berg, Mark Spencer Rudner, and Netanel Lindner. “Exponentially Long Lifetime of Universal Quasi-Steady States in Topological Floquet Pumps.” SciPost Physics. SciPost Foundation, 2020. https://doi.org/10.21468/scipostphys.9.1.015. ieee: T. Gulden, E. Berg, M. S. Rudner, and N. Lindner, “Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps,” SciPost Physics, vol. 9. SciPost Foundation, 2020. ista: Gulden T, Berg E, Rudner MS, Lindner N. 2020. Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps. SciPost Physics. 9, 015. mla: Gulden, Tobias, et al. “Exponentially Long Lifetime of Universal Quasi-Steady States in Topological Floquet Pumps.” SciPost Physics, vol. 9, 015, SciPost Foundation, 2020, doi:10.21468/scipostphys.9.1.015. short: T. Gulden, E. Berg, M.S. Rudner, N. Lindner, SciPost Physics 9 (2020). date_created: 2020-08-04T13:04:15Z date_published: 2020-07-29T00:00:00Z date_updated: 2023-08-22T08:28:24Z day: '29' ddc: - '530' department: - _id: MaSe doi: 10.21468/scipostphys.9.1.015 ec_funded: 1 external_id: isi: - '000557362300008' file: - access_level: open_access content_type: application/pdf creator: dernst date_created: 2020-08-06T08:56:06Z date_updated: 2020-08-06T08:56:06Z file_id: '8202' file_name: 2020_SciPostPhys_Gulden.pdf file_size: 531137 relation: main_file success: 1 file_date_updated: 2020-08-06T08:56:06Z has_accepted_license: '1' intvolume: ' 9' isi: 1 language: - iso: eng month: '07' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: SciPost Physics publication_identifier: issn: - 2542-4653 publication_status: published publisher: SciPost Foundation quality_controlled: '1' scopus_import: '1' status: public title: Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 9 year: '2020' ... --- _id: '8308' abstract: - lang: eng text: 'Many-body localization provides a mechanism to avoid thermalization in isolated interacting quantum systems. The breakdown of thermalization may be complete, when all eigenstates in the many-body spectrum become localized, or partial, when the so-called many-body mobility edge separates localized and delocalized parts of the spectrum. Previously, De Roeck et al. [Phys. Rev. B 93, 014203 (2016)] suggested a possible instability of the many-body mobility edge in energy density. The local ergodic regions—so-called “bubbles”—resonantly spread throughout the system, leading to delocalization. In order to study such instability mechanism, in this work we design a model featuring many-body mobility edge in particle density: the states at small particle density are localized, while increasing the density of particles leads to delocalization. Using numerical simulations with matrix product states, we demonstrate the stability of many-body localization with respect to small bubbles in large dilute systems for experimentally relevant timescales. In addition, we demonstrate that processes where the bubble spreads are favored over processes that lead to resonant tunneling, suggesting a possible mechanism behind the observed stability of many-body mobility edge. We conclude by proposing experiments to probe particle density mobility edge in the Bose-Hubbard model.' acknowledgement: 'Acknowledgments. We acknowledge useful discussions with W. De Roeck and A. Michailidis. P.B. was supported by the European Union''s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 665385. D.A. was supported by the Swiss National Science Foundation. M.S. was supported by European Research Council (ERC) under the European Union''s Horizon 2020 research and innovation program (Grant Agreement No. 850899). This work benefited from visits to KITP, supported by the National Science Foundation under Grant No. NSF PHY-1748958 and from the program “Thermalization, Many Body Localization and Hydrodynamics” at International Centre for Theoretical Sciences (Code: ICTS/hydrodynamics2019/11).' article_number: 060202(R) article_processing_charge: No article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Brighi P, Abanin DA, Serbyn M. Stability of mobility edges in disordered interacting systems. Physical Review B. 2020;102(6). doi:10.1103/physrevb.102.060202 apa: Brighi, P., Abanin, D. A., & Serbyn, M. (2020). Stability of mobility edges in disordered interacting systems. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.102.060202 chicago: Brighi, Pietro, Dmitry A. Abanin, and Maksym Serbyn. “Stability of Mobility Edges in Disordered Interacting Systems.” Physical Review B. American Physical Society, 2020. https://doi.org/10.1103/physrevb.102.060202. ieee: P. Brighi, D. A. Abanin, and M. Serbyn, “Stability of mobility edges in disordered interacting systems,” Physical Review B, vol. 102, no. 6. American Physical Society, 2020. ista: Brighi P, Abanin DA, Serbyn M. 2020. Stability of mobility edges in disordered interacting systems. Physical Review B. 102(6), 060202(R). mla: Brighi, Pietro, et al. “Stability of Mobility Edges in Disordered Interacting Systems.” Physical Review B, vol. 102, no. 6, 060202(R), American Physical Society, 2020, doi:10.1103/physrevb.102.060202. short: P. Brighi, D.A. Abanin, M. Serbyn, Physical Review B 102 (2020). date_created: 2020-08-26T19:27:42Z date_published: 2020-08-26T00:00:00Z date_updated: 2023-08-24T14:20:21Z day: '26' ddc: - '530' department: - _id: MaSe doi: 10.1103/physrevb.102.060202 ec_funded: 1 external_id: isi: - '000562628300001' file: - access_level: open_access checksum: 716442fa7861323fcc80b93718ca009c content_type: application/pdf creator: mserbyn date_created: 2020-08-26T19:28:55Z date_updated: 2020-08-26T19:28:55Z file_id: '8309' file_name: PhysRevB.102.060202.pdf file_size: 488825 relation: main_file success: 1 - access_level: open_access checksum: be0abdc8f60fe065ea6dc92e08487122 content_type: application/pdf creator: mserbyn date_created: 2020-08-26T19:29:00Z date_updated: 2020-08-26T19:29:00Z file_id: '8310' file_name: Supplementary-mbme.pdf file_size: 711405 relation: main_file success: 1 file_date_updated: 2020-08-26T19:29:00Z has_accepted_license: '1' intvolume: ' 102' isi: 1 issue: '6' language: - iso: eng month: '08' oa: 1 oa_version: None project: - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program - _id: 23841C26-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '850899' name: 'Non-Ergodic Quantum Matter: Universality, Dynamics and Control' publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '12732' relation: dissertation_contains status: public scopus_import: '1' status: public title: Stability of mobility edges in disordered interacting systems type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 102 year: '2020' ... --- _id: '7971' abstract: - lang: eng text: Multilayer graphene lattices allow for an additional tunability of the band structure by the strong perpendicular electric field. In particular, the emergence of the new multiple Dirac points in ABA stacked trilayer graphene subject to strong transverse electric fields was proposed theoretically and confirmed experimentally. These new Dirac points dubbed “gullies” emerge from the interplay between strong electric field and trigonal warping. In this work, we first characterize the properties of new emergent Dirac points and show that the electric field can be used to tune the distance between gullies in the momentum space. We demonstrate that the band structure has multiple Lifshitz transitions and higher-order singularity of “monkey saddle” type. Following the characterization of the band structure, we consider the spectrum of Landau levels and structure of their wave functions. In the limit of strong electric fields when gullies are well separated in momentum space, they give rise to triply degenerate Landau levels. In the second part of this work, we investigate how degeneracy between three gully Landau levels is lifted in the presence of interactions. Within the Hartree-Fock approximation we show that the symmetry breaking state interpolates between the fully gully polarized state that breaks C3 symmetry at high displacement field and the gully symmetric state when the electric field is decreased. The discontinuous transition between these two states is driven by enhanced intergully tunneling and exchange. We conclude by outlining specific experimental predictions for the existence of such a symmetry-breaking state. article_number: '245411' article_processing_charge: No article_type: original author: - first_name: Peng full_name: Rao, Peng id: 47C23AC6-02D0-11E9-BD0E-99399A5D3DEB last_name: Rao orcid: 0000-0003-1250-0021 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Rao P, Serbyn M. Gully quantum Hall ferromagnetism in biased trilayer graphene. Physical Review B. 2020;101(24). doi:10.1103/physrevb.101.245411 apa: Rao, P., & Serbyn, M. (2020). Gully quantum Hall ferromagnetism in biased trilayer graphene. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.101.245411 chicago: Rao, Peng, and Maksym Serbyn. “Gully Quantum Hall Ferromagnetism in Biased Trilayer Graphene.” Physical Review B. American Physical Society, 2020. https://doi.org/10.1103/physrevb.101.245411. ieee: P. Rao and M. Serbyn, “Gully quantum Hall ferromagnetism in biased trilayer graphene,” Physical Review B, vol. 101, no. 24. American Physical Society, 2020. ista: Rao P, Serbyn M. 2020. Gully quantum Hall ferromagnetism in biased trilayer graphene. Physical Review B. 101(24), 245411. mla: Rao, Peng, and Maksym Serbyn. “Gully Quantum Hall Ferromagnetism in Biased Trilayer Graphene.” Physical Review B, vol. 101, no. 24, 245411, American Physical Society, 2020, doi:10.1103/physrevb.101.245411. short: P. Rao, M. Serbyn, Physical Review B 101 (2020). date_created: 2020-06-17T14:52:06Z date_published: 2020-06-15T00:00:00Z date_updated: 2023-09-05T12:11:37Z day: '15' department: - _id: MaSe doi: 10.1103/physrevb.101.245411 external_id: isi: - '000538715500010' intvolume: ' 101' isi: 1 issue: '24' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2002.05739 month: '06' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Gully quantum Hall ferromagnetism in biased trilayer graphene type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 101 year: '2020' ... --- _id: '6477' abstract: - lang: eng text: 'Thermalizing quantum systems are conventionallydescribed by statistical mechanics at equilib-rium. However, not all systems fall into this category, with many-body localization providinga generic mechanism for thermalization to fail in strongly disordered systems. Many-bodylocalized (MBL) systems remain perfect insulators at nonzero temperature, which do notthermalize and therefore cannot be describedusing statistical mechanics. This Colloquiumreviews recent theoretical and experimental advances in studies of MBL systems, focusing onthe new perspective provided by entanglement and nonequilibrium experimental probes suchas quantum quenches. Theoretically, MBL systems exhibit a new kind of robust integrability: anextensive set of quasilocal integrals of motion emerges, which provides an intuitive explanationof the breakdown of thermalization. A description based on quasilocal integrals of motion isused to predict dynamical properties of MBL systems, such as the spreading of quantumentanglement, the behavior of local observables, and the response to external dissipativeprocesses. Furthermore, MBL systems can exhibit eigenstate transitions and quantum ordersforbidden in thermodynamic equilibrium. An outline isgiven of the current theoretical under-standing of the quantum-to-classical transitionbetween many-body localized and ergodic phasesand anomalous transport in the vicinity of that transition. Experimentally, synthetic quantumsystems, which are well isolated from an external thermal reservoir, provide natural platforms forrealizing the MBL phase. Recent experiments with ultracold atoms, trapped ions, superconductingqubits, and quantum materials, in which different signatures of many-body localization have beenobserved, are reviewed. This Colloquium concludes by listing outstanding challenges andpromising future research directions.' article_number: '021001' article_processing_charge: No article_type: original author: - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin - first_name: Ehud full_name: Altman, Ehud last_name: Altman - first_name: Immanuel full_name: Bloch, Immanuel last_name: Bloch - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: 'Abanin DA, Altman E, Bloch I, Serbyn M. Colloquium: Many-body localization, thermalization, and entanglement. Reviews of Modern Physics. 2019;91(2). doi:10.1103/revmodphys.91.021001' apa: 'Abanin, D. A., Altman, E., Bloch, I., & Serbyn, M. (2019). Colloquium: Many-body localization, thermalization, and entanglement. Reviews of Modern Physics. American Physical Society. https://doi.org/10.1103/revmodphys.91.021001' chicago: 'Abanin, Dmitry A., Ehud Altman, Immanuel Bloch, and Maksym Serbyn. “Colloquium: Many-Body Localization, Thermalization, and Entanglement.” Reviews of Modern Physics. American Physical Society, 2019. https://doi.org/10.1103/revmodphys.91.021001.' ieee: 'D. A. Abanin, E. Altman, I. Bloch, and M. Serbyn, “Colloquium: Many-body localization, thermalization, and entanglement,” Reviews of Modern Physics, vol. 91, no. 2. American Physical Society, 2019.' ista: 'Abanin DA, Altman E, Bloch I, Serbyn M. 2019. Colloquium: Many-body localization, thermalization, and entanglement. Reviews of Modern Physics. 91(2), 021001.' mla: 'Abanin, Dmitry A., et al. “Colloquium: Many-Body Localization, Thermalization, and Entanglement.” Reviews of Modern Physics, vol. 91, no. 2, 021001, American Physical Society, 2019, doi:10.1103/revmodphys.91.021001.' short: D.A. Abanin, E. Altman, I. Bloch, M. Serbyn, Reviews of Modern Physics 91 (2019). date_created: 2019-05-23T07:38:43Z date_published: 2019-05-22T00:00:00Z date_updated: 2023-08-25T10:37:56Z day: '22' ddc: - '530' department: - _id: MaSe doi: 10.1103/revmodphys.91.021001 external_id: arxiv: - '1804.11065' isi: - '000469046900001' file: - access_level: open_access checksum: 4aec0e6662b09f6e0f828cd30ff2c3a6 content_type: application/pdf creator: mserbyn date_created: 2019-05-23T07:39:05Z date_updated: 2020-07-14T12:47:31Z file_id: '6478' file_name: RevModPhys.91.021001.pdf file_size: 1695677 relation: main_file file_date_updated: 2020-07-14T12:47:31Z has_accepted_license: '1' intvolume: ' 91' isi: 1 issue: '2' language: - iso: eng month: '05' oa: 1 oa_version: Published Version publication: Reviews of Modern Physics publication_identifier: eissn: - 0034-6861 issn: - 1539-0756 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: 'Colloquium: Many-body localization, thermalization, and entanglement' type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 91 year: '2019' ... --- _id: '6174' abstract: - lang: eng text: We propose a scaling theory for the many-body localization (MBL) phase transition in one dimension, building on the idea that it proceeds via a “quantum avalanche.” We argue that the critical properties can be captured at a coarse-grained level by a Kosterlitz-Thouless (KT) renormalization group (RG) flow. On phenomenological grounds, we identify the scaling variables as the density of thermal regions and the length scale that controls the decay of typical matrix elements. Within this KT picture, the MBL phase is a line of fixed points that terminates at the delocalization transition. We discuss two possible scenarios distinguished by the distribution of rare, fractal thermal inclusions within the MBL phase. In the first scenario, these regions have a stretched exponential distribution in the MBL phase. In the second scenario, the near-critical MBL phase hosts rare thermal regions that are power-law-distributed in size. This points to the existence of a second transition within the MBL phase, at which these power laws change to the stretched exponential form expected at strong disorder. We numerically simulate two different phenomenological RGs previously proposed to describe the MBL transition. Both RGs display a universal power-law length distribution of thermal regions at the transition with a critical exponent αc=2, and continuously varying exponents in the MBL phase consistent with the KT picture. article_number: '094205' article_processing_charge: No article_type: original author: - first_name: Philipp T. full_name: Dumitrescu, Philipp T. last_name: Dumitrescu - first_name: Anna full_name: Goremykina, Anna last_name: Goremykina - first_name: Siddharth A. full_name: Parameswaran, Siddharth A. last_name: Parameswaran - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Romain full_name: Vasseur, Romain last_name: Vasseur citation: ama: Dumitrescu PT, Goremykina A, Parameswaran SA, Serbyn M, Vasseur R. Kosterlitz-Thouless scaling at many-body localization phase transitions. Physical Review B. 2019;99(9). doi:10.1103/physrevb.99.094205 apa: Dumitrescu, P. T., Goremykina, A., Parameswaran, S. A., Serbyn, M., & Vasseur, R. (2019). Kosterlitz-Thouless scaling at many-body localization phase transitions. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.99.094205 chicago: Dumitrescu, Philipp T., Anna Goremykina, Siddharth A. Parameswaran, Maksym Serbyn, and Romain Vasseur. “Kosterlitz-Thouless Scaling at Many-Body Localization Phase Transitions.” Physical Review B. American Physical Society, 2019. https://doi.org/10.1103/physrevb.99.094205. ieee: P. T. Dumitrescu, A. Goremykina, S. A. Parameswaran, M. Serbyn, and R. Vasseur, “Kosterlitz-Thouless scaling at many-body localization phase transitions,” Physical Review B, vol. 99, no. 9. American Physical Society, 2019. ista: Dumitrescu PT, Goremykina A, Parameswaran SA, Serbyn M, Vasseur R. 2019. Kosterlitz-Thouless scaling at many-body localization phase transitions. Physical Review B. 99(9), 094205. mla: Dumitrescu, Philipp T., et al. “Kosterlitz-Thouless Scaling at Many-Body Localization Phase Transitions.” Physical Review B, vol. 99, no. 9, 094205, American Physical Society, 2019, doi:10.1103/physrevb.99.094205. short: P.T. Dumitrescu, A. Goremykina, S.A. Parameswaran, M. Serbyn, R. Vasseur, Physical Review B 99 (2019). date_created: 2019-03-25T07:32:08Z date_published: 2019-03-22T00:00:00Z date_updated: 2023-09-05T12:11:13Z day: '22' department: - _id: MaSe doi: 10.1103/physrevb.99.094205 external_id: arxiv: - '1811.03103' isi: - '000462883200001' intvolume: ' 99' isi: 1 issue: '9' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1811.03103 month: '03' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Kosterlitz-Thouless scaling at many-body localization phase transitions type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 99 year: '2019' ... --- _id: '6575' abstract: - lang: eng text: Motivated by recent experimental observations of coherent many-body revivals in a constrained Rydbergatom chain, we construct a weak quasilocal deformation of the Rydberg-blockaded Hamiltonian, whichmakes the revivals virtually perfect. Our analysis suggests the existence of an underlying nonintegrableHamiltonian which supports an emergent SU(2)-spin dynamics within a small subspace of the many-bodyHilbert space. We show that such perfect dynamics necessitates the existence of atypical, nonergodicenergy eigenstates—quantum many-body scars. Furthermore, using these insights, we construct a toymodel that hosts exact quantum many-body scars, providing an intuitive explanation of their origin. Ourresults offer specific routes to enhancing coherent many-body revivals and provide a step towardestablishing the stability of quantum many-body scars in the thermodynamic limit. article_number: '220603' article_processing_charge: No article_type: original author: - first_name: Soonwon full_name: Choi, Soonwon last_name: Choi - first_name: Christopher J. full_name: Turner, Christopher J. last_name: Turner - first_name: Hannes full_name: Pichler, Hannes last_name: Pichler - first_name: Wen Wei full_name: Ho, Wen Wei last_name: Ho - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Mikhail D. full_name: Lukin, Mikhail D. last_name: Lukin - first_name: Dmitry A. full_name: Abanin, Dmitry A. last_name: Abanin citation: ama: Choi S, Turner CJ, Pichler H, et al. Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters. 2019;122(22). doi:10.1103/PhysRevLett.122.220603 apa: Choi, S., Turner, C. J., Pichler, H., Ho, W. W., Michailidis, A., Papić, Z., … Abanin, D. A. (2019). Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.122.220603 chicago: Choi, Soonwon, Christopher J. Turner, Hannes Pichler, Wen Wei Ho, Alexios Michailidis, Zlatko Papić, Maksym Serbyn, Mikhail D. Lukin, and Dmitry A. Abanin. “Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.” Physical Review Letters. American Physical Society, 2019. https://doi.org/10.1103/PhysRevLett.122.220603. ieee: S. Choi et al., “Emergent SU(2) dynamics and perfect quantum many-body scars,” Physical Review Letters, vol. 122, no. 22. American Physical Society, 2019. ista: Choi S, Turner CJ, Pichler H, Ho WW, Michailidis A, Papić Z, Serbyn M, Lukin MD, Abanin DA. 2019. Emergent SU(2) dynamics and perfect quantum many-body scars. Physical Review Letters. 122(22), 220603. mla: Choi, Soonwon, et al. “Emergent SU(2) Dynamics and Perfect Quantum Many-Body Scars.” Physical Review Letters, vol. 122, no. 22, 220603, American Physical Society, 2019, doi:10.1103/PhysRevLett.122.220603. short: S. Choi, C.J. Turner, H. Pichler, W.W. Ho, A. Michailidis, Z. Papić, M. Serbyn, M.D. Lukin, D.A. Abanin, Physical Review Letters 122 (2019). date_created: 2019-06-23T21:59:13Z date_published: 2019-06-07T00:00:00Z date_updated: 2024-02-28T13:12:22Z day: '07' department: - _id: MaSe doi: 10.1103/PhysRevLett.122.220603 external_id: arxiv: - '1812.05561' isi: - '000470885800005' intvolume: ' 122' isi: 1 issue: '22' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1812.05561 month: '06' oa: 1 oa_version: Preprint publication: Physical Review Letters publication_identifier: eissn: - '10797114' issn: - '00319007' publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Emergent SU(2) dynamics and perfect quantum many-body scars type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 122 year: '2019' ... --- _id: '7013' abstract: - lang: eng text: Chains of superconducting circuit devices provide a natural platform for studies of synthetic bosonic quantum matter. Motivated by the recent experimental progress in realizing disordered and interacting chains of superconducting transmon devices, we study the bosonic many-body localization phase transition using the methods of exact diagonalization as well as matrix product state dynamics. We estimate the location of transition separating the ergodic and the many-body localized phases as a function of the disorder strength and the many-body on-site interaction strength. The main difference between the bosonic model realized by superconducting circuits and similar fermionic model is that the effect of the on-site interaction is stronger due to the possibility of multiple excitations occupying the same site. The phase transition is found to be robust upon including longer-range hopping and interaction terms present in the experiments. Furthermore, we calculate experimentally relevant local observables and show that their temporal fluctuations can be used to distinguish between the dynamics of Anderson insulator, many-body localization, and delocalized phases. While we consider unitary dynamics, neglecting the effects of dissipation, decoherence, and measurement back action, the timescales on which the dynamics is unitary are sufficient for observation of characteristic dynamics in the many-body localized phase. Moreover, the experimentally available disorder strength and interactions allow for tuning the many-body localization phase transition, thus making the arrays of superconducting circuit devices a promising platform for exploring localization physics and phase transition. article_number: '134504' article_processing_charge: No article_type: original author: - first_name: Tuure full_name: Orell, Tuure last_name: Orell - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Matti full_name: Silveri, Matti last_name: Silveri citation: ama: Orell T, Michailidis A, Serbyn M, Silveri M. Probing the many-body localization phase transition with superconducting circuits. Physical Review B. 2019;100(13). doi:10.1103/physrevb.100.134504 apa: Orell, T., Michailidis, A., Serbyn, M., & Silveri, M. (2019). Probing the many-body localization phase transition with superconducting circuits. Physical Review B. American Physical Society. https://doi.org/10.1103/physrevb.100.134504 chicago: Orell, Tuure, Alexios Michailidis, Maksym Serbyn, and Matti Silveri. “Probing the Many-Body Localization Phase Transition with Superconducting Circuits.” Physical Review B. American Physical Society, 2019. https://doi.org/10.1103/physrevb.100.134504. ieee: T. Orell, A. Michailidis, M. Serbyn, and M. Silveri, “Probing the many-body localization phase transition with superconducting circuits,” Physical Review B, vol. 100, no. 13. American Physical Society, 2019. ista: Orell T, Michailidis A, Serbyn M, Silveri M. 2019. Probing the many-body localization phase transition with superconducting circuits. Physical Review B. 100(13), 134504. mla: Orell, Tuure, et al. “Probing the Many-Body Localization Phase Transition with Superconducting Circuits.” Physical Review B, vol. 100, no. 13, 134504, American Physical Society, 2019, doi:10.1103/physrevb.100.134504. short: T. Orell, A. Michailidis, M. Serbyn, M. Silveri, Physical Review B 100 (2019). date_created: 2019-11-13T08:25:48Z date_published: 2019-10-01T00:00:00Z date_updated: 2024-02-28T13:13:13Z day: '01' department: - _id: MaSe doi: 10.1103/physrevb.100.134504 external_id: arxiv: - '1907.04043' isi: - '000489036500004' intvolume: ' 100' isi: 1 issue: '13' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1907.04043 month: '10' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Probing the many-body localization phase transition with superconducting circuits type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 100 year: '2019' ... --- _id: '7200' abstract: - lang: eng text: Recent scanning tunneling microscopy experiments in NbN thin disordered superconducting films found an emergent inhomogeneity at the scale of tens of nanometers. This inhomogeneity is mirrored by an apparent dimensional crossover in the paraconductivity measured in transport above the superconducting critical temperature Tc. This behavior was interpreted in terms of an anomalous diffusion of fluctuating Cooper pairs that display a quasiconfinement (i.e., a slowing down of their diffusive dynamics) on length scales shorter than the inhomogeneity identified by tunneling experiments. Here, we assume this anomalous diffusive behavior of fluctuating Cooper pairs and calculate the effect of these fluctuations on the electron density of states above Tc. We find that the density of states is substantially suppressed up to temperatures well above Tc. This behavior, which is closely reminiscent of a pseudogap, only arises from the anomalous diffusion of fluctuating Cooper pairs in the absence of stable preformed pairs, setting the stage for an intermediate behavior between the two common paradigms in the superconducting-insulator transition, namely, the localization of Cooper pairs (the so-called bosonic scenario) and the breaking of Cooper pairs into unpaired electrons due to strong disorder (the so-called fermionic scenario). article_number: '174518' article_processing_charge: No article_type: original author: - first_name: Pietro full_name: Brighi, Pietro id: 4115AF5C-F248-11E8-B48F-1D18A9856A87 last_name: Brighi orcid: 0000-0002-7969-2729 - first_name: Marco full_name: Grilli, Marco last_name: Grilli - first_name: Brigitte full_name: Leridon, Brigitte last_name: Leridon - first_name: Sergio full_name: Caprara, Sergio last_name: Caprara citation: ama: Brighi P, Grilli M, Leridon B, Caprara S. Effect of anomalous diffusion of fluctuating Cooper pairs on the density of states of superconducting NbN thin films. Physical Review B. 2019;100(17). doi:10.1103/PhysRevB.100.174518 apa: Brighi, P., Grilli, M., Leridon, B., & Caprara, S. (2019). Effect of anomalous diffusion of fluctuating Cooper pairs on the density of states of superconducting NbN thin films. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.100.174518 chicago: Brighi, Pietro, Marco Grilli, Brigitte Leridon, and Sergio Caprara. “Effect of Anomalous Diffusion of Fluctuating Cooper Pairs on the Density of States of Superconducting NbN Thin Films.” Physical Review B. American Physical Society, 2019. https://doi.org/10.1103/PhysRevB.100.174518. ieee: P. Brighi, M. Grilli, B. Leridon, and S. Caprara, “Effect of anomalous diffusion of fluctuating Cooper pairs on the density of states of superconducting NbN thin films,” Physical Review B, vol. 100, no. 17. American Physical Society, 2019. ista: Brighi P, Grilli M, Leridon B, Caprara S. 2019. Effect of anomalous diffusion of fluctuating Cooper pairs on the density of states of superconducting NbN thin films. Physical Review B. 100(17), 174518. mla: Brighi, Pietro, et al. “Effect of Anomalous Diffusion of Fluctuating Cooper Pairs on the Density of States of Superconducting NbN Thin Films.” Physical Review B, vol. 100, no. 17, 174518, American Physical Society, 2019, doi:10.1103/PhysRevB.100.174518. short: P. Brighi, M. Grilli, B. Leridon, S. Caprara, Physical Review B 100 (2019). date_created: 2019-12-22T23:00:41Z date_published: 2019-11-25T00:00:00Z date_updated: 2024-02-28T13:14:08Z day: '25' department: - _id: MaSe doi: 10.1103/PhysRevB.100.174518 external_id: arxiv: - '1907.13579' isi: - '000498845700006' intvolume: ' 100' isi: 1 issue: '17' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1907.13579 month: '11' oa: 1 oa_version: Preprint publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Effect of anomalous diffusion of fluctuating Cooper pairs on the density of states of superconducting NbN thin films type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 100 year: '2019' ... --- _id: '5906' abstract: - lang: eng text: We introduce a simple, exactly solvable strong-randomness renormalization group (RG) model for the many-body localization (MBL) transition in one dimension. Our approach relies on a family of RG flows parametrized by the asymmetry between thermal and localized phases. We identify the physical MBL transition in the limit of maximal asymmetry, reflecting the instability of MBL against rare thermal inclusions. We find a critical point that is localized with power-law distributed thermal inclusions. The typical size of critical inclusions remains finite at the transition, while the average size is logarithmically diverging. We propose a two-parameter scaling theory for the many-body localization transition that falls into the Kosterlitz-Thouless universality class, with the MBL phase corresponding to a stable line of fixed points with multifractal behavior. article_number: '040601' article_processing_charge: No article_type: original author: - first_name: Anna full_name: Goremykina, Anna last_name: Goremykina - first_name: Romain full_name: Vasseur, Romain last_name: Vasseur - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 citation: ama: Goremykina A, Vasseur R, Serbyn M. Analytically solvable renormalization group for the many-body localization transition. Physical Review Letters. 2019;122(4). doi:10.1103/physrevlett.122.040601 apa: Goremykina, A., Vasseur, R., & Serbyn, M. (2019). Analytically solvable renormalization group for the many-body localization transition. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.122.040601 chicago: Goremykina, Anna, Romain Vasseur, and Maksym Serbyn. “Analytically Solvable Renormalization Group for the Many-Body Localization Transition.” Physical Review Letters. American Physical Society, 2019. https://doi.org/10.1103/physrevlett.122.040601. ieee: A. Goremykina, R. Vasseur, and M. Serbyn, “Analytically solvable renormalization group for the many-body localization transition,” Physical Review Letters, vol. 122, no. 4. American Physical Society, 2019. ista: Goremykina A, Vasseur R, Serbyn M. 2019. Analytically solvable renormalization group for the many-body localization transition. Physical Review Letters. 122(4), 040601. mla: Goremykina, Anna, et al. “Analytically Solvable Renormalization Group for the Many-Body Localization Transition.” Physical Review Letters, vol. 122, no. 4, 040601, American Physical Society, 2019, doi:10.1103/physrevlett.122.040601. short: A. Goremykina, R. Vasseur, M. Serbyn, Physical Review Letters 122 (2019). date_created: 2019-02-01T08:22:28Z date_published: 2019-02-01T00:00:00Z date_updated: 2024-02-28T13:13:38Z day: '01' department: - _id: MaSe doi: 10.1103/physrevlett.122.040601 external_id: arxiv: - '1807.04285' isi: - '000456783700001' intvolume: ' 122' isi: 1 issue: '4' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1807.04285 month: '02' oa: 1 oa_version: Preprint publication: Physical Review Letters publication_identifier: eissn: - 1079-7114 issn: - 0031-9007 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Analytically solvable renormalization group for the many-body localization transition type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 122 year: '2019' ... --- _id: '46' abstract: - lang: eng text: We analyze a disordered central spin model, where a central spin interacts equally with each spin in a periodic one-dimensional (1D) random-field Heisenberg chain. If the Heisenberg chain is initially in the many-body localized (MBL) phase, we find that the coupling to the central spin suffices to delocalize the chain for a substantial range of coupling strengths. We calculate the phase diagram of the model and identify the phase boundary between the MBL and ergodic phase. Within the localized phase, the central spin significantly enhances the rate of the logarithmic entanglement growth and its saturation value. We attribute the increase in entanglement entropy to a nonextensive enhancement of magnetization fluctuations induced by the central spin. Finally, we demonstrate that correlation functions of the central spin can be utilized to distinguish between MBL and ergodic phases of the 1D chain. Hence, we propose the use of a central spin as a possible experimental probe to identify the MBL phase. acknowledgement: F.P. acknowledges the sup- port of the DFG Research Unit FOR 1807 through Grants No. PO 1370/2-1 and No. TRR80, the Nanosystems Initiative Munich (NIM) by the German Excellence Initiative, and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 771537). N.Y.Y. acknowledges support from the NSF (PHY-1654740), the ARO STIR program, and a Google research award. article_number: '161122' article_processing_charge: No article_type: original author: - first_name: Daniel full_name: Hetterich, Daniel last_name: Hetterich - first_name: Norman full_name: Yao, Norman last_name: Yao - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Frank full_name: Pollmann, Frank last_name: Pollmann - first_name: Björn full_name: Trauzettel, Björn last_name: Trauzettel citation: ama: Hetterich D, Yao N, Serbyn M, Pollmann F, Trauzettel B. Detection and characterization of many-body localization in central spin models. Physical Review B. 2018;98(16). doi:10.1103/PhysRevB.98.161122 apa: Hetterich, D., Yao, N., Serbyn, M., Pollmann, F., & Trauzettel, B. (2018). Detection and characterization of many-body localization in central spin models. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.98.161122 chicago: Hetterich, Daniel, Norman Yao, Maksym Serbyn, Frank Pollmann, and Björn Trauzettel. “Detection and Characterization of Many-Body Localization in Central Spin Models.” Physical Review B. American Physical Society, 2018. https://doi.org/10.1103/PhysRevB.98.161122. ieee: D. Hetterich, N. Yao, M. Serbyn, F. Pollmann, and B. Trauzettel, “Detection and characterization of many-body localization in central spin models,” Physical Review B, vol. 98, no. 16. American Physical Society, 2018. ista: Hetterich D, Yao N, Serbyn M, Pollmann F, Trauzettel B. 2018. Detection and characterization of many-body localization in central spin models. Physical Review B. 98(16), 161122. mla: Hetterich, Daniel, et al. “Detection and Characterization of Many-Body Localization in Central Spin Models.” Physical Review B, vol. 98, no. 16, 161122, American Physical Society, 2018, doi:10.1103/PhysRevB.98.161122. short: D. Hetterich, N. Yao, M. Serbyn, F. Pollmann, B. Trauzettel, Physical Review B 98 (2018). date_created: 2018-12-11T11:44:20Z date_published: 2018-10-15T00:00:00Z date_updated: 2023-09-11T12:55:03Z day: '15' department: - _id: MaSe doi: 10.1103/PhysRevB.98.161122 external_id: arxiv: - '1806.08316' isi: - '000448596500002' intvolume: ' 98' isi: 1 issue: '16' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1806.08316 month: '10' oa: 1 oa_version: Preprint publication: Physical Review B publication_status: published publisher: American Physical Society publist_id: '8008' quality_controlled: '1' scopus_import: '1' status: public title: Detection and characterization of many-body localization in central spin models type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 98 year: '2018' ... --- _id: '289' abstract: - lang: eng text: We report on quantum capacitance measurements of high quality, graphite- and hexagonal boron nitride encapsulated Bernal stacked trilayer graphene devices. At zero applied magnetic field, we observe a number of electron density- and electrical displacement-tuned features in the electronic compressibility associated with changes in Fermi surface topology. At high displacement field and low density, strong trigonal warping gives rise to emergent Dirac gullies centered near the corners of the hexagonal Brillouin and related by three fold rotation symmetry. At low magnetic fields of B=1.25~T, the gullies manifest as a change in the degeneracy of the Landau levels from two to three. Weak incompressible states are also observed at integer filling within these triplets Landau levels, which a Hartree-Fock analysis indicates are associated with Coulomb-driven nematic phases that spontaneously break rotation symmetry. acknowledgement: The experimental work at UCSB was funded by the National Science Foundation under Grant No. DMR- 1654186. Work at Columbia was supported by the National Science Foundation under Grant No. DMR- 1507788. K. W. and T. T. acknowledge support from the Elemental Strategy Initiative conducted by the Ministry of Education, Culture, Sports, Science and Technology, Japan, and the Japan Society for the Promotion of Science KAKENHI Grant No. JP15K21722. E. M. S. acknowledges the support of the Elings Fellowship from the California Nanosystems Institute at the University of California, Santa Barbara. A. F. Y. acknowledges the support of the David and Lucile Packard foundation and the Sloan Foundation. Measurements made use of a dilution refrigerator funded through the Major Research Instrumentation program of the U.S. National Science Foundation under Grant No. DMR- 1531389, and the MRL Shared Experimental Facilities, which are supported by the MRSEC Program of the U.S. National Science Foundation under Grant No. DMR- 1720256. article_number: '167601' article_processing_charge: No article_type: original author: - first_name: Alexander full_name: Zibrov, Alexander last_name: Zibrov - first_name: Rao full_name: Peng, Rao id: 47C23AC6-02D0-11E9-BD0E-99399A5D3DEB last_name: Peng orcid: 0000-0003-1250-0021 - first_name: Carlos full_name: Kometter, Carlos last_name: Kometter - first_name: Jia full_name: Li, Jia last_name: Li - first_name: Cory full_name: Dean, Cory last_name: Dean - first_name: Takashi full_name: Taniguchi, Takashi last_name: Taniguchi - first_name: Kenji full_name: Watanabe, Kenji last_name: Watanabe - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Andrea full_name: Young, Andrea last_name: Young citation: ama: Zibrov A, Rao P, Kometter C, et al. Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters. 2018;121(16). doi:10.1103/PhysRevLett.121.167601 apa: Zibrov, A., Rao, P., Kometter, C., Li, J., Dean, C., Taniguchi, T., … Young, A. (2018). Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.121.167601 chicago: Zibrov, Alexander, Peng Rao, Carlos Kometter, Jia Li, Cory Dean, Takashi Taniguchi, Kenji Watanabe, Maksym Serbyn, and Andrea Young. “Emergent Dirac Gullies and Gully-Symmetry-Breaking Quantum Hall States in ABA Trilayer Graphene.” Physical Review Letters. American Physical Society, 2018. https://doi.org/10.1103/PhysRevLett.121.167601. ieee: A. Zibrov et al., “Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene,” Physical Review Letters, vol. 121, no. 16. American Physical Society, 2018. ista: Zibrov A, Rao P, Kometter C, Li J, Dean C, Taniguchi T, Watanabe K, Serbyn M, Young A. 2018. Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene. Physical Review Letters. 121(16), 167601. mla: Zibrov, Alexander, et al. “Emergent Dirac Gullies and Gully-Symmetry-Breaking Quantum Hall States in ABA Trilayer Graphene.” Physical Review Letters, vol. 121, no. 16, 167601, American Physical Society, 2018, doi:10.1103/PhysRevLett.121.167601. short: A. Zibrov, P. Rao, C. Kometter, J. Li, C. Dean, T. Taniguchi, K. Watanabe, M. Serbyn, A. Young, Physical Review Letters 121 (2018). date_created: 2018-12-11T11:45:38Z date_published: 2018-10-19T00:00:00Z date_updated: 2023-09-11T13:39:50Z day: '19' department: - _id: MaSe doi: 10.1103/PhysRevLett.121.167601 external_id: arxiv: - '1805.01038' isi: - '000447307500007' intvolume: ' 121' isi: 1 issue: '16' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1805.01038 month: '10' oa: 1 oa_version: Preprint publication: Physical Review Letters publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Emergent dirac gullies and gully-symmetry-breaking quantum hall states in ABA trilayer graphene type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 121 year: '2018' ... --- _id: '5767' abstract: - lang: eng text: 'Cuprate superconductors have long been thought of as having strong electronic correlations but negligible spin-orbit coupling. Using spin- and angle-resolved photoemission spectroscopy, we discovered that one of the most studied cuprate superconductors, Bi2212, has a nontrivial spin texture with a spin-momentum locking that circles the Brillouin zone center and a spin-layer locking that allows states of opposite spin to be localized in different parts of the unit cell. Our findings pose challenges for the vast majority of models of cuprates, such as the Hubbard model and its variants, where spin-orbit interaction has been mostly neglected, and open the intriguing question of how the high-temperature superconducting state emerges in the presence of this nontrivial spin texture. ' acknowledgement: ' M.S. was supported by the Gordon and Betty Moore Foundation s EPiQS Initiative through grant GBMF4307' article_processing_charge: No article_type: original author: - first_name: Kenneth full_name: Gotlieb, Kenneth last_name: Gotlieb - first_name: Chiu-Yun full_name: Lin, Chiu-Yun last_name: Lin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Wentao full_name: Zhang, Wentao last_name: Zhang - first_name: Christopher L. full_name: Smallwood, Christopher L. last_name: Smallwood - first_name: Christopher full_name: Jozwiak, Christopher last_name: Jozwiak - first_name: Hiroshi full_name: Eisaki, Hiroshi last_name: Eisaki - first_name: Zahid full_name: Hussain, Zahid last_name: Hussain - first_name: Ashvin full_name: Vishwanath, Ashvin last_name: Vishwanath - first_name: Alessandra full_name: Lanzara, Alessandra last_name: Lanzara citation: ama: Gotlieb K, Lin C-Y, Serbyn M, et al. Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor. Science. 2018;362(6420):1271-1275. doi:10.1126/science.aao0980 apa: Gotlieb, K., Lin, C.-Y., Serbyn, M., Zhang, W., Smallwood, C. L., Jozwiak, C., … Lanzara, A. (2018). Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.aao0980 chicago: Gotlieb, Kenneth, Chiu-Yun Lin, Maksym Serbyn, Wentao Zhang, Christopher L. Smallwood, Christopher Jozwiak, Hiroshi Eisaki, Zahid Hussain, Ashvin Vishwanath, and Alessandra Lanzara. “Revealing Hidden Spin-Momentum Locking in a High-Temperature Cuprate Superconductor.” Science. American Association for the Advancement of Science, 2018. https://doi.org/10.1126/science.aao0980. ieee: K. Gotlieb et al., “Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor,” Science, vol. 362, no. 6420. American Association for the Advancement of Science, pp. 1271–1275, 2018. ista: Gotlieb K, Lin C-Y, Serbyn M, Zhang W, Smallwood CL, Jozwiak C, Eisaki H, Hussain Z, Vishwanath A, Lanzara A. 2018. Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor. Science. 362(6420), 1271–1275. mla: Gotlieb, Kenneth, et al. “Revealing Hidden Spin-Momentum Locking in a High-Temperature Cuprate Superconductor.” Science, vol. 362, no. 6420, American Association for the Advancement of Science, 2018, pp. 1271–75, doi:10.1126/science.aao0980. short: K. Gotlieb, C.-Y. Lin, M. Serbyn, W. Zhang, C.L. Smallwood, C. Jozwiak, H. Eisaki, Z. Hussain, A. Vishwanath, A. Lanzara, Science 362 (2018) 1271–1275. date_created: 2018-12-19T14:53:50Z date_published: 2018-12-14T00:00:00Z date_updated: 2023-09-18T08:11:56Z day: '14' department: - _id: MaSe doi: 10.1126/science.aao0980 external_id: isi: - '000452994400048' intvolume: ' 362' isi: 1 issue: '6420' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1126/science.aao0980 month: '12' oa: 1 oa_version: Published Version page: 1271-1275 publication: Science publication_identifier: eissn: - 1095-9203 issn: - 0036-8075 publication_status: published publisher: American Association for the Advancement of Science quality_controlled: '1' scopus_import: '1' status: public title: Revealing hidden spin-momentum locking in a high-temperature cuprate superconductor type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 362 year: '2018' ... --- _id: '327' abstract: - lang: eng text: Many-body quantum systems typically display fast dynamics and ballistic spreading of information. Here we address the open problem of how slow the dynamics can be after a generic breaking of integrability by local interactions. We develop a method based on degenerate perturbation theory that reveals slow dynamical regimes and delocalization processes in general translation invariant models, along with accurate estimates of their delocalization time scales. Our results shed light on the fundamental questions of the robustness of quantum integrable systems and the possibility of many-body localization without disorder. As an example, we construct a large class of one-dimensional lattice models where, despite the absence of asymptotic localization, the transient dynamics is exceptionally slow, i.e., the dynamics is indistinguishable from that of many-body localized systems for the system sizes and time scales accessible in experiments and numerical simulations. acknowledgement: 'We thank F. Huveneers for useful discussions. Z.P. and A.M. acknowledge support by EPSRC Grant No. EP/P009409/1 and and the Royal Society Research Grant No. RG160635. Statement of compliance with EPSRC policy framework on research data: This publication is theoretical work that does not require supporting research data. D.A. acknowledges support by the Swiss National Science Foundation. M.Z., M.M. and T.P. acknowledge Grants J1-7279 (M.Z.) and N1-0025 (M.M. and T.P.) of Slovenian Research Agency, and Advanced Grant of European Research Council, Grant No. 694544 - OMNES (T.P.).' article_number: '104307' article_processing_charge: No author: - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Marko full_name: Žnidarič, Marko last_name: Žnidarič - first_name: Mariya full_name: Medvedyeva, Mariya last_name: Medvedyeva - first_name: Dmitry full_name: Abanin, Dmitry last_name: Abanin - first_name: Tomaž full_name: Prosen, Tomaž last_name: Prosen - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić citation: ama: Michailidis A, Žnidarič M, Medvedyeva M, Abanin D, Prosen T, Papić Z. Slow dynamics in translation-invariant quantum lattice models. Physical Review B. 2018;97(10). doi:10.1103/PhysRevB.97.104307 apa: Michailidis, A., Žnidarič, M., Medvedyeva, M., Abanin, D., Prosen, T., & Papić, Z. (2018). Slow dynamics in translation-invariant quantum lattice models. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.97.104307 chicago: Michailidis, Alexios, Marko Žnidarič, Mariya Medvedyeva, Dmitry Abanin, Tomaž Prosen, and Zlatko Papić. “Slow Dynamics in Translation-Invariant Quantum Lattice Models.” Physical Review B. American Physical Society, 2018. https://doi.org/10.1103/PhysRevB.97.104307. ieee: A. Michailidis, M. Žnidarič, M. Medvedyeva, D. Abanin, T. Prosen, and Z. Papić, “Slow dynamics in translation-invariant quantum lattice models,” Physical Review B, vol. 97, no. 10. American Physical Society, 2018. ista: Michailidis A, Žnidarič M, Medvedyeva M, Abanin D, Prosen T, Papić Z. 2018. Slow dynamics in translation-invariant quantum lattice models. Physical Review B. 97(10), 104307. mla: Michailidis, Alexios, et al. “Slow Dynamics in Translation-Invariant Quantum Lattice Models.” Physical Review B, vol. 97, no. 10, 104307, American Physical Society, 2018, doi:10.1103/PhysRevB.97.104307. short: A. Michailidis, M. Žnidarič, M. Medvedyeva, D. Abanin, T. Prosen, Z. Papić, Physical Review B 97 (2018). date_created: 2018-12-11T11:45:50Z date_published: 2018-03-19T00:00:00Z date_updated: 2023-09-18T09:31:46Z day: '19' department: - _id: MaSe doi: 10.1103/PhysRevB.97.104307 external_id: isi: - '000427798800005' intvolume: ' 97' isi: 1 issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1706.05026 month: '03' oa: 1 oa_version: Preprint publication: Physical Review B publication_status: published publisher: American Physical Society publist_id: '7538' quality_controlled: '1' scopus_import: '1' status: public title: Slow dynamics in translation-invariant quantum lattice models type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 97 year: '2018' ... --- _id: '296' abstract: - lang: eng text: The thermodynamic description of many-particle systems rests on the assumption of ergodicity, the ability of a system to explore all allowed configurations in the phase space. Recent studies on many-body localization have revealed the existence of systems that strongly violate ergodicity in the presence of quenched disorder. Here, we demonstrate that ergodicity can be weakly broken by a different mechanism, arising from the presence of special eigenstates in the many-body spectrum that are reminiscent of quantum scars in chaotic non-interacting systems. In the single-particle case, quantum scars correspond to wavefunctions that concentrate in the vicinity of unstable periodic classical trajectories. We show that many-body scars appear in the Fibonacci chain, a model with a constrained local Hilbert space that has recently been experimentally realized in a Rydberg-atom quantum simulator. The quantum scarred eigenstates are embedded throughout the otherwise thermalizing many-body spectrum but lead to direct experimental signatures, as we show for periodic recurrences that reproduce those observed in the experiment. Our results suggest that scarred many-body bands give rise to a new universality class of quantum dynamics, opening up opportunities for the creation of novel states with long-lived coherence in systems that are now experimentally realizable. acknowledgement: C.J.T., A.M. and Z.P. acknowledge support from EPSRC grants EP/P009409/1 and EP/M50807X/1, and Royal Society Research Grant RG160635. D.A. acknowledges support from the Swiss National Science Foundation. article_processing_charge: No article_type: original author: - first_name: Christopher full_name: Turner, Christopher last_name: Turner - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: Dmitry full_name: Abanin, Dmitry last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Zlatko full_name: Papić, Zlatko last_name: Papić citation: ama: Turner C, Michailidis A, Abanin D, Serbyn M, Papić Z. Weak ergodicity breaking from quantum many-body scars. Nature Physics. 2018;14:745-749. doi:10.1038/s41567-018-0137-5 apa: Turner, C., Michailidis, A., Abanin, D., Serbyn, M., & Papić, Z. (2018). Weak ergodicity breaking from quantum many-body scars. Nature Physics. Nature Publishing Group. https://doi.org/10.1038/s41567-018-0137-5 chicago: Turner, Christopher, Alexios Michailidis, Dmitry Abanin, Maksym Serbyn, and Zlatko Papić. “Weak Ergodicity Breaking from Quantum Many-Body Scars.” Nature Physics. Nature Publishing Group, 2018. https://doi.org/10.1038/s41567-018-0137-5. ieee: C. Turner, A. Michailidis, D. Abanin, M. Serbyn, and Z. Papić, “Weak ergodicity breaking from quantum many-body scars,” Nature Physics, vol. 14. Nature Publishing Group, pp. 745–749, 2018. ista: Turner C, Michailidis A, Abanin D, Serbyn M, Papić Z. 2018. Weak ergodicity breaking from quantum many-body scars. Nature Physics. 14, 745–749. mla: Turner, Christopher, et al. “Weak Ergodicity Breaking from Quantum Many-Body Scars.” Nature Physics, vol. 14, Nature Publishing Group, 2018, pp. 745–49, doi:10.1038/s41567-018-0137-5. short: C. Turner, A. Michailidis, D. Abanin, M. Serbyn, Z. Papić, Nature Physics 14 (2018) 745–749. date_created: 2018-12-11T11:45:40Z date_published: 2018-05-14T00:00:00Z date_updated: 2023-09-19T10:37:55Z day: '14' department: - _id: MaSe doi: 10.1038/s41567-018-0137-5 external_id: isi: - '000438253600028' intvolume: ' 14' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: http://eprints.whiterose.ac.uk/130860/ month: '05' oa: 1 oa_version: Submitted Version page: 745 - 749 publication: Nature Physics publication_status: published publisher: Nature Publishing Group publist_id: '7585' quality_controlled: '1' scopus_import: '1' status: public title: Weak ergodicity breaking from quantum many-body scars type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 14 year: '2018' ... --- _id: '44' abstract: - lang: eng text: 'Recent realization of a kinetically constrained chain of Rydberg atoms by Bernien et al., [Nature (London) 551, 579 (2017)] resulted in the observation of unusual revivals in the many-body quantum dynamics. In our previous work [C. J. Turner et al., Nat. Phys. 14, 745 (2018)], such dynamics was attributed to the existence of “quantum scarred” eigenstates in the many-body spectrum of the experimentally realized model. Here, we present a detailed study of the eigenstate properties of the same model. We find that the majority of the eigenstates exhibit anomalous thermalization: the observable expectation values converge to their Gibbs ensemble values, but parametrically slower compared to the predictions of the eigenstate thermalization hypothesis (ETH). Amidst the thermalizing spectrum, we identify nonergodic eigenstates that strongly violate the ETH, whose number grows polynomially with system size. Previously, the same eigenstates were identified via large overlaps with certain product states, and were used to explain the revivals observed in experiment. Here, we find that these eigenstates, in addition to highly atypical expectation values of local observables, also exhibit subthermal entanglement entropy that scales logarithmically with the system size. Moreover, we identify an additional class of quantum scarred eigenstates, and discuss their manifestations in the dynamics starting from initial product states. We use forward scattering approximation to describe the structure and physical properties of quantum scarred eigenstates. Finally, we discuss the stability of quantum scars to various perturbations. We observe that quantum scars remain robust when the introduced perturbation is compatible with the forward scattering approximation. In contrast, the perturbations which most efficiently destroy quantum scars also lead to the restoration of “canonical” thermalization.' acknowledged_ssus: - _id: ScienComp article_number: '155134' article_processing_charge: No author: - first_name: C J full_name: Turner, C J last_name: Turner - first_name: Alexios full_name: Michailidis, Alexios id: 36EBAD38-F248-11E8-B48F-1D18A9856A87 last_name: Michailidis orcid: 0000-0002-8443-1064 - first_name: D A full_name: Abanin, D A last_name: Abanin - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Z full_name: Papić, Z last_name: Papić citation: ama: 'Turner CJ, Michailidis A, Abanin DA, Serbyn M, Papić Z. Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown of thermalization, and stability to perturbations. Physical Review B. 2018;98(15). doi:10.1103/PhysRevB.98.155134' apa: 'Turner, C. J., Michailidis, A., Abanin, D. A., Serbyn, M., & Papić, Z. (2018). Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown of thermalization, and stability to perturbations. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.98.155134' chicago: 'Turner, C J, Alexios Michailidis, D A Abanin, Maksym Serbyn, and Z Papić. “Quantum Scarred Eigenstates in a Rydberg Atom Chain: Entanglement, Breakdown of Thermalization, and Stability to Perturbations.” Physical Review B. American Physical Society, 2018. https://doi.org/10.1103/PhysRevB.98.155134.' ieee: 'C. J. Turner, A. Michailidis, D. A. Abanin, M. Serbyn, and Z. Papić, “Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown of thermalization, and stability to perturbations,” Physical Review B, vol. 98, no. 15. American Physical Society, 2018.' ista: 'Turner CJ, Michailidis A, Abanin DA, Serbyn M, Papić Z. 2018. Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown of thermalization, and stability to perturbations. Physical Review B. 98(15), 155134.' mla: 'Turner, C. J., et al. “Quantum Scarred Eigenstates in a Rydberg Atom Chain: Entanglement, Breakdown of Thermalization, and Stability to Perturbations.” Physical Review B, vol. 98, no. 15, 155134, American Physical Society, 2018, doi:10.1103/PhysRevB.98.155134.' short: C.J. Turner, A. Michailidis, D.A. Abanin, M. Serbyn, Z. Papić, Physical Review B 98 (2018). date_created: 2018-12-11T11:44:19Z date_published: 2018-10-22T00:00:00Z date_updated: 2023-10-10T13:28:49Z day: '22' department: - _id: MaSe doi: 10.1103/PhysRevB.98.155134 external_id: arxiv: - '1806.10933' isi: - '000447919100001' intvolume: ' 98' isi: 1 issue: '15' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1806.10933 month: '10' oa: 1 oa_version: Preprint publication: Physical Review B publication_status: published publisher: American Physical Society publist_id: '8010' quality_controlled: '1' scopus_import: '1' status: public title: 'Quantum scarred eigenstates in a Rydberg atom chain: Entanglement, breakdown of thermalization, and stability to perturbations' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 98 year: '2018' ... --- _id: '724' abstract: - lang: eng text: We investigate the stationary and dynamical behavior of an Anderson localized chain coupled to a single central bound state. Although this coupling partially dilutes the Anderson localized peaks towards nearly resonant sites, the most weight of the original peaks remains unchanged. This leads to multifractal wave functions with a frozen spectrum of fractal dimensions, which is characteristic for localized phases in models with power-law hopping. Using a perturbative approach we identify two different dynamical regimes. At weak couplings to the central site, the transport of particles and information is logarithmic in time, a feature usually attributed to many-body localization. We connect such transport to the persistence of the Poisson statistics of level spacings in parts of the spectrum. In contrast, at stronger couplings the level repulsion is established in the entire spectrum, the problem can be mapped to the Fano resonance, and the transport is ballistic. acknowledgement: "We would like to thank Dmitry Abanin, Christophe De\r\nBeule, \ Joel Moore, Romain Vasseur, and Norman Yao for\r\nmany stimulating discussions. \ Financial support has been\r\nprovided by the Deutsche Forschungsgemeinschaft \ (DFG)\r\nvia Grant No. TR950/8-1, SFB 1170 “ToCoTronics” and the\r\nENB Graduate \ School on Topological Insulators. M.S. was\r\nsupported by Gordon and Betty Moore Foundation’s EPiQS\r\nInitiative through Grant No. GBMF4307. F.P. acknowledges\r\nsupport from the DFG Research Unit FOR 1807 through Grant\r\nNo. PO 1370/2-1." article_number: '104203' author: - first_name: Daniel full_name: Hetterich, Daniel last_name: Hetterich - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Fernando full_name: Domínguez, Fernando last_name: Domínguez - first_name: Frank full_name: Pollmann, Frank last_name: Pollmann - first_name: Björn full_name: Trauzettel, Björn last_name: Trauzettel citation: ama: Hetterich D, Serbyn M, Domínguez F, Pollmann F, Trauzettel B. Noninteracting central site model localization and logarithmic entanglement growth. Physical Review B. 2017;96(10). doi:10.1103/PhysRevB.96.104203 apa: Hetterich, D., Serbyn, M., Domínguez, F., Pollmann, F., & Trauzettel, B. (2017). Noninteracting central site model localization and logarithmic entanglement growth. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.96.104203 chicago: Hetterich, Daniel, Maksym Serbyn, Fernando Domínguez, Frank Pollmann, and Björn Trauzettel. “Noninteracting Central Site Model Localization and Logarithmic Entanglement Growth.” Physical Review B. American Physical Society, 2017. https://doi.org/10.1103/PhysRevB.96.104203. ieee: D. Hetterich, M. Serbyn, F. Domínguez, F. Pollmann, and B. Trauzettel, “Noninteracting central site model localization and logarithmic entanglement growth,” Physical Review B, vol. 96, no. 10. American Physical Society, 2017. ista: Hetterich D, Serbyn M, Domínguez F, Pollmann F, Trauzettel B. 2017. Noninteracting central site model localization and logarithmic entanglement growth. Physical Review B. 96(10), 104203. mla: Hetterich, Daniel, et al. “Noninteracting Central Site Model Localization and Logarithmic Entanglement Growth.” Physical Review B, vol. 96, no. 10, 104203, American Physical Society, 2017, doi:10.1103/PhysRevB.96.104203. short: D. Hetterich, M. Serbyn, F. Domínguez, F. Pollmann, B. Trauzettel, Physical Review B 96 (2017). date_created: 2018-12-11T11:48:09Z date_published: 2017-09-13T00:00:00Z date_updated: 2021-01-12T08:12:35Z day: '13' department: - _id: MaSe doi: 10.1103/PhysRevB.96.104203 intvolume: ' 96' issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1701.02744 month: '09' oa: 1 oa_version: Submitted Version publication: Physical Review B publication_identifier: issn: - '24699950' publication_status: published publisher: American Physical Society publist_id: '6955' quality_controlled: '1' scopus_import: 1 status: public title: Noninteracting central site model localization and logarithmic entanglement growth type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 96 year: '2017' ... --- _id: '834' abstract: - lang: eng text: 'Thermal and many-body localized phases are separated by a dynamical phase transition of a new kind. We analyze the distribution of off-diagonal matrix elements of local operators across this transition in two different models of disordered spin chains. We show that the behavior of matrix elements can be used to characterize the breakdown of thermalization and to extract the many-body Thouless energy. We find that upon increasing the disorder strength the system enters a critical region around the many-body localization transition. The properties of the system in this region are: (i) the Thouless energy becomes smaller than the level spacing, (ii) the matrix elements show critical dependence on the energy difference, and (iii) the matrix elements, viewed as amplitudes of a fictitious wave function, exhibit strong multifractality. This critical region decreases with the system size, which we interpret as evidence for a diverging correlation length at the many-body localization transition. Our findings show that the correlation length becomes larger than the accessible system sizes in a broad range of disorder strength values and shed light on the critical behavior near the many-body localization transition.' acknowledgement: We acknowledge useful discussions with V. Kravtsov, T. Grover, and R. Vasseur. M.S. was supported by Gordon and Betty Moore Foundation’s EPiQS Initiative through Grant GBMF4307. M.S. and D.A. acknowledge hospitality of KITP, where parts of this work were completed (supported in part by the National Science Foundation under Grant No. NSF PHY11-25915) article_number: '104201' article_processing_charge: No author: - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Papic full_name: Zlatko, Papic last_name: Zlatko - first_name: Dmitry full_name: Abanin, Dmitry last_name: Abanin citation: ama: Serbyn M, Zlatko P, Abanin D. Thouless energy and multifractality across the many-body localization transition. Physical Review B - Condensed Matter and Materials Physics. 2017;96(10). doi:10.1103/PhysRevB.96.104201 apa: Serbyn, M., Zlatko, P., & Abanin, D. (2017). Thouless energy and multifractality across the many-body localization transition. Physical Review B - Condensed Matter and Materials Physics. American Physical Society. https://doi.org/10.1103/PhysRevB.96.104201 chicago: Serbyn, Maksym, Papic Zlatko, and Dmitry Abanin. “Thouless Energy and Multifractality across the Many-Body Localization Transition.” Physical Review B - Condensed Matter and Materials Physics. American Physical Society, 2017. https://doi.org/10.1103/PhysRevB.96.104201. ieee: M. Serbyn, P. Zlatko, and D. Abanin, “Thouless energy and multifractality across the many-body localization transition,” Physical Review B - Condensed Matter and Materials Physics, vol. 96, no. 10. American Physical Society, 2017. ista: Serbyn M, Zlatko P, Abanin D. 2017. Thouless energy and multifractality across the many-body localization transition. Physical Review B - Condensed Matter and Materials Physics. 96(10), 104201. mla: Serbyn, Maksym, et al. “Thouless Energy and Multifractality across the Many-Body Localization Transition.” Physical Review B - Condensed Matter and Materials Physics, vol. 96, no. 10, 104201, American Physical Society, 2017, doi:10.1103/PhysRevB.96.104201. short: M. Serbyn, P. Zlatko, D. Abanin, Physical Review B - Condensed Matter and Materials Physics 96 (2017). date_created: 2018-12-11T11:48:45Z date_published: 2017-09-06T00:00:00Z date_updated: 2023-09-26T15:51:54Z day: '06' department: - _id: MaSe doi: 10.1103/PhysRevB.96.104201 external_id: isi: - '000409429300004' intvolume: ' 96' isi: 1 issue: '10' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1610.02389 month: '09' oa: 1 oa_version: Submitted Version publication: Physical Review B - Condensed Matter and Materials Physics publication_identifier: issn: - '24699950' publication_status: published publisher: American Physical Society publist_id: '6814' quality_controlled: '1' scopus_import: '1' status: public title: Thouless energy and multifractality across the many-body localization transition type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 96 year: '2017' ...