[{"oa_version":"Published Version","file":[{"date_updated":"2024-06-03T11:18:51Z","success":1,"file_size":4973291,"checksum":"6fdeecd21c166db8dedb927ecc2e6025","file_name":"2024_SciPostPhys_Kraemer.pdf","content_type":"application/pdf","relation":"main_file","date_created":"2024-06-03T11:18:51Z","creator":"dernst","access_level":"open_access","file_id":"17109"}],"article_processing_charge":"No","publication_status":"published","publisher":"SciPost Foundation","date_published":"2024-04-08T00:00:00Z","isi":1,"month":"04","arxiv":1,"date_updated":"2025-09-08T07:45:40Z","year":"2024","abstract":[{"text":"The homeostasis of epithelial tissue relies on a balance between the self-renewal of stem cell populations, cellular differentiation, and loss. Although this balance needs to be tightly regulated to avoid pathologies, such as tumor growth, the regulatory mechanisms, both cell-intrinsic and collective, which ensure tissue steady-state are still poorly understood. Here, we develop a computational model that incorporates basic assumptions of stem cell renewal into distinct populations and mechanical interactions between cells. We find that the model generates unexpected dynamic features: stem cells repel each other in the bulk tissue and are thus found rather isolated, as in a number of in vivo contexts. By mapping the system onto a gas of passive Brownian particles with effective repulsive interactions, that arise from the generated flows of differentiated cells, we show that we can quantitatively describe such stem cell distribution in tissues. The interaction potential between a pair of stem cells decays exponentially with a characteristic length that spans several cell sizes, corresponding to the volume of cells generated per stem cell division. Our findings may help understanding the dynamics of normal and cancerous epithelial tissues.","lang":"eng"}],"scopus_import":"1","_id":"17104","day":"08","publication":"SciPost Physics","issue":"4","file_date_updated":"2024-06-03T11:18:51Z","department":[{"_id":"EdHa"}],"type":"journal_article","citation":{"ista":"Krämer JC, Hannezo EB, Gompper G, Elgeti J. 2024. Mechanically-driven stem cell separation in tissues caused by proliferating daughter cells. SciPost Physics. 16(4), 097.","apa":"Krämer, J. C., Hannezo, E. B., Gompper, G., &#38; Elgeti, J. (2024). Mechanically-driven stem cell separation in tissues caused by proliferating daughter cells. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.16.4.097\">https://doi.org/10.21468/scipostphys.16.4.097</a>","short":"J.C. Krämer, E.B. Hannezo, G. Gompper, J. Elgeti, SciPost Physics 16 (2024).","mla":"Krämer, Johannes C., et al. “Mechanically-Driven Stem Cell Separation in Tissues Caused by Proliferating Daughter Cells.” <i>SciPost Physics</i>, vol. 16, no. 4, 097, SciPost Foundation, 2024, doi:<a href=\"https://doi.org/10.21468/scipostphys.16.4.097\">10.21468/scipostphys.16.4.097</a>.","ama":"Krämer JC, Hannezo EB, Gompper G, Elgeti J. Mechanically-driven stem cell separation in tissues caused by proliferating daughter cells. <i>SciPost Physics</i>. 2024;16(4). doi:<a href=\"https://doi.org/10.21468/scipostphys.16.4.097\">10.21468/scipostphys.16.4.097</a>","chicago":"Krämer, Johannes C., Edouard B Hannezo, Gerhard Gompper, and Jens Elgeti. “Mechanically-Driven Stem Cell Separation in Tissues Caused by Proliferating Daughter Cells.” <i>SciPost Physics</i>. SciPost Foundation, 2024. <a href=\"https://doi.org/10.21468/scipostphys.16.4.097\">https://doi.org/10.21468/scipostphys.16.4.097</a>.","ieee":"J. C. Krämer, E. B. Hannezo, G. Gompper, and J. Elgeti, “Mechanically-driven stem cell separation in tissues caused by proliferating daughter cells,” <i>SciPost Physics</i>, vol. 16, no. 4. SciPost Foundation, 2024."},"oa":1,"acknowledgement":"JE and JK gratefully acknowledge financial support from the Initiative and Networking Fund (IVF) via the grant number ERC-RA-004. Simulations were performed with computing resources granted by RWTH Aachen University under project ‘rwth0475’.","publication_identifier":{"issn":["2542-4653"]},"doi":"10.21468/scipostphys.16.4.097","article_number":"097","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","ddc":["530"],"date_created":"2024-06-03T08:58:44Z","article_type":"original","has_accepted_license":"1","volume":16,"tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"title":"Mechanically-driven stem cell separation in tissues caused by proliferating daughter cells","quality_controlled":"1","author":[{"full_name":"Krämer, Johannes C.","first_name":"Johannes C.","last_name":"Krämer"},{"last_name":"Hannezo","orcid":"0000-0001-6005-1561","full_name":"Hannezo, Edouard B","first_name":"Edouard B","id":"3A9DB764-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Gompper","first_name":"Gerhard","full_name":"Gompper, Gerhard"},{"full_name":"Elgeti, Jens","first_name":"Jens","last_name":"Elgeti"}],"external_id":{"arxiv":["2310.04272"],"isi":["001202370200001"]},"language":[{"iso":"eng"}],"status":"public","intvolume":"        16"},{"publication_identifier":{"issn":["2542-4653"]},"acknowledgement":"We acknowledge useful discussions with M. Geier, A. Levchenko, B. Ramshaw, T. Scaffidi, and\r\nJ. Shabani. This research was funded by the Austrian Science Fund (FWF) F 86.\r\nFor the purpose of open access, authors have applied a CC BY public copyright licence to any\r\nAuthor Accepted Manuscript version arising from this submission. MS acknowledges hospitality of KITP supported in part by the National Science Foundation under Grants No. NSF\r\nPHY-1748958 and PHY-2309135. APH acknowledges the support of the NOMIS foundation.","doi":"10.21468/scipostphys.16.5.115","oa":1,"type":"journal_article","department":[{"_id":"MaSe"},{"_id":"AnHi"}],"citation":{"ista":"Babkin S, Higginbotham AP, Serbyn M. 2024. Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field. SciPost Physics. 16(5), 115.","apa":"Babkin, S., Higginbotham, A. P., &#38; Serbyn, M. (2024). Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.16.5.115\">https://doi.org/10.21468/scipostphys.16.5.115</a>","short":"S. Babkin, A.P. Higginbotham, M. Serbyn, SciPost Physics 16 (2024).","mla":"Babkin, Serafim, et al. “Proximity-Induced Gapless Superconductivity in Two-Dimensional Rashba Semiconductor in Magnetic Field.” <i>SciPost Physics</i>, vol. 16, no. 5, 115, SciPost Foundation, 2024, doi:<a href=\"https://doi.org/10.21468/scipostphys.16.5.115\">10.21468/scipostphys.16.5.115</a>.","ama":"Babkin S, Higginbotham AP, Serbyn M. Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field. <i>SciPost Physics</i>. 2024;16(5). doi:<a href=\"https://doi.org/10.21468/scipostphys.16.5.115\">10.21468/scipostphys.16.5.115</a>","chicago":"Babkin, Serafim, Andrew P Higginbotham, and Maksym Serbyn. “Proximity-Induced Gapless Superconductivity in Two-Dimensional Rashba Semiconductor in Magnetic Field.” <i>SciPost Physics</i>. SciPost Foundation, 2024. <a href=\"https://doi.org/10.21468/scipostphys.16.5.115\">https://doi.org/10.21468/scipostphys.16.5.115</a>.","ieee":"S. Babkin, A. P. Higginbotham, and M. Serbyn, “Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field,” <i>SciPost Physics</i>, vol. 16, no. 5. SciPost Foundation, 2024."},"issue":"5","file_date_updated":"2024-05-07T12:58:47Z","publication":"SciPost Physics","day":"01","_id":"15367","abstract":[{"lang":"eng","text":"Two-dimensional semiconductor-superconductor heterostructures form the foundation of numerous nanoscale physical systems. However, measuring the properties of such heterostructures, and characterizing the semiconductor in-situ is challenging. A recent experimental study by [Phys. Rev. Lett. 128, 107701 (2022)] was able to probe the semiconductor within the heterostructure using microwave measurements of the superfluid density. This work revealed a rapid depletion of superfluid density in semiconductor, caused by the in-plane magnetic field which in presence of spin-orbit coupling creates so-called Bogoliubov Fermi surfaces. The experimental work used a simplified theoretical model that neglected the presence of non-magnetic disorder in the semiconductor, hence describing the data only qualitatively. Motivated by experiments, we introduce a theoretical model describing a disordered semiconductor with strong spin-orbit coupling that is proximitized by a superconductor. Our model provides specific predictions for the density of states and superfluid density. Presence of disorder leads to the emergence of a gapless superconducting phase, that may be viewed as a manifestation of Bogoliubov Fermi surface. When applied to real experimental data, our model showcases excellent quantitative agreement, enabling the extraction of material parameters such as mean free path and mobility, and estimating g-tensor after taking into account the orbital contribution of magnetic field. Our model can be used to probe in-situ parameters of other superconductor-semiconductor heterostructures and can be further extended to give access to transport properties."}],"year":"2024","scopus_import":"1","month":"05","isi":1,"arxiv":1,"date_updated":"2026-06-03T07:16:00Z","publisher":"SciPost Foundation","date_published":"2024-05-01T00:00:00Z","publication_status":"published","article_processing_charge":"Yes","project":[{"_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2","name":"Protected states of quantum matter"},{"name":"Center for Correlated Quantum Materials and Solid State Quantum Systems:  Probing topology in circuits and quantum materials","_id":"34a7f947-11ca-11ed-8bc3-c5dc2bbaae25","grant_number":"F8609"}],"oa_version":"Published Version","file":[{"file_size":2733685,"date_updated":"2024-05-07T12:58:47Z","success":1,"content_type":"application/pdf","checksum":"f999204856417dcf5a736ac8df432b96","file_name":"2024_SciPostPhys_Babkin.pdf","creator":"dernst","access_level":"open_access","relation":"main_file","date_created":"2024-05-07T12:58:47Z","file_id":"15369"}],"intvolume":"        16","status":"public","external_id":{"isi":["001215855200002"],"arxiv":["2311.09347"]},"author":[{"id":"41e64307-6672-11ee-b9ad-cc7a0075a479","last_name":"Babkin","orcid":"0009-0003-7382-8036","full_name":"Babkin, Serafim","first_name":"Serafim"},{"id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","last_name":"Higginbotham","orcid":"0000-0003-2607-2363","full_name":"Higginbotham, Andrew P","first_name":"Andrew P"},{"first_name":"Maksym","full_name":"Serbyn, Maksym","orcid":"0000-0002-2399-5827","last_name":"Serbyn","id":"47809E7E-F248-11E8-B48F-1D18A9856A87"}],"language":[{"iso":"eng"}],"title":"Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"volume":16,"has_accepted_license":"1","article_type":"original","corr_author":"1","ddc":["530"],"date_created":"2024-05-06T09:02:18Z","article_number":"115","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345"},{"title":"Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"intvolume":"        15","status":"public","external_id":{"arxiv":["2210.15607"]},"author":[{"orcid":"0000-0002-7969-2729","last_name":"Brighi","first_name":"Pietro","full_name":"Brighi, Pietro","id":"4115AF5C-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Ljubotina","orcid":"0000-0003-0038-7068","full_name":"Ljubotina, Marko","first_name":"Marko","id":"F75EE9BE-5C90-11EA-905D-16643DDC885E"},{"last_name":"Serbyn","orcid":"0000-0002-2399-5827","first_name":"Maksym","full_name":"Serbyn, Maksym","id":"47809E7E-F248-11E8-B48F-1D18A9856A87"}],"language":[{"iso":"eng"}],"article_type":"original","corr_author":"1","ddc":["530"],"date_created":"2023-09-14T13:08:23Z","keyword":["General Physics and Astronomy"],"article_number":"093","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","related_material":{"record":[{"id":"12750","status":"public","relation":"earlier_version"}]},"volume":15,"ec_funded":1,"has_accepted_license":"1","issue":"3","file_date_updated":"2023-09-20T10:46:10Z","publication":"SciPost Physics","_id":"14334","day":"13","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).","publication_identifier":{"issn":["2542-4653"]},"doi":"10.21468/scipostphys.15.3.093","oa":1,"department":[{"_id":"MaSe"}],"type":"journal_article","citation":{"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.","apa":"Brighi, P., Ljubotina, M., &#38; Serbyn, M. (2023). Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.15.3.093\">https://doi.org/10.21468/scipostphys.15.3.093</a>","mla":"Brighi, Pietro, et al. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” <i>SciPost Physics</i>, vol. 15, no. 3, 093, SciPost Foundation, 2023, doi:<a href=\"https://doi.org/10.21468/scipostphys.15.3.093\">10.21468/scipostphys.15.3.093</a>.","ama":"Brighi P, Ljubotina M, Serbyn M. Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models. <i>SciPost Physics</i>. 2023;15(3). doi:<a href=\"https://doi.org/10.21468/scipostphys.15.3.093\">10.21468/scipostphys.15.3.093</a>","short":"P. Brighi, M. Ljubotina, M. Serbyn, SciPost Physics 15 (2023).","chicago":"Brighi, Pietro, Marko Ljubotina, and Maksym Serbyn. “Hilbert Space Fragmentation and Slow Dynamics in Particle-Conserving Quantum East Models.” <i>SciPost Physics</i>. SciPost Foundation, 2023. <a href=\"https://doi.org/10.21468/scipostphys.15.3.093\">https://doi.org/10.21468/scipostphys.15.3.093</a>.","ieee":"P. Brighi, M. Ljubotina, and M. Serbyn, “Hilbert space fragmentation and slow dynamics in particle-conserving quantum East models,” <i>SciPost Physics</i>, vol. 15, no. 3. SciPost Foundation, 2023."},"publication_status":"published","project":[{"name":"Non-Ergodic Quantum Matter: Universality, Dynamics and Control","_id":"23841C26-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","grant_number":"850899"}],"article_processing_charge":"No","file":[{"file_name":"2023_SciPostPhysics_Brighi.pdf","checksum":"4cef6a8021f6b6c47ab2f2f2b1387ac2","content_type":"application/pdf","date_updated":"2023-09-20T10:46:10Z","success":1,"file_size":4866506,"file_id":"14350","date_created":"2023-09-20T10:46:10Z","relation":"main_file","access_level":"open_access","creator":"dernst"}],"oa_version":"Published Version","year":"2023","scopus_import":"1","abstract":[{"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.","lang":"eng"}],"month":"09","date_updated":"2025-04-14T07:52:05Z","arxiv":1,"publisher":"SciPost Foundation","date_published":"2023-09-13T00:00:00Z"},{"ddc":["530"],"date_created":"2023-12-10T13:03:07Z","article_type":"original","corr_author":"1","keyword":["General Physics and Astronomy"],"article_number":"232","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","ec_funded":1,"volume":15,"has_accepted_license":"1","title":"Non-equilibrium dynamics of dipolar polarons","quality_controlled":"1","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"status":"public","intvolume":"        15","author":[{"last_name":"Volosniev","orcid":"0000-0003-0393-5525","full_name":"Volosniev, Artem","first_name":"Artem","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Giacomo","full_name":"Bighin, Giacomo","last_name":"Bighin","orcid":"0000-0001-8823-9777","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Santos, Luis","first_name":"Luis","last_name":"Santos"},{"last_name":"Peña Ardila","first_name":"Luisllu A.","full_name":"Peña Ardila, Luisllu A."}],"external_id":{"arxiv":["2305.17969"],"isi":["001121864100003"]},"language":[{"iso":"eng"}],"project":[{"grant_number":"M02641","call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425","name":"A path-integral approach to composite impurities"},{"name":"ISTplus - Postdoctoral Fellowships","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"754411"}],"article_processing_charge":"No","publication_status":"published","file":[{"file_size":3543541,"success":1,"date_updated":"2023-12-11T07:42:04Z","content_type":"application/pdf","file_name":"2023_SciPostPhysics_Volosniev.pdf","checksum":"e664372a1fe9d628a9bb1d135ebab7d8","access_level":"open_access","creator":"dernst","date_created":"2023-12-11T07:42:04Z","relation":"main_file","file_id":"14669"}],"oa_version":"Published Version","isi":1,"month":"12","date_updated":"2025-09-09T13:34:34Z","arxiv":1,"scopus_import":"1","year":"2023","abstract":[{"lang":"eng","text":"We study the out-of-equilibrium quantum dynamics of dipolar polarons, i.e., impurities immersed in a dipolar Bose-Einstein condensate, after a quench of the impurity-boson interaction. We show that the dipolar nature of the condensate and of the impurity results in anisotropic relaxation dynamics, in particular, anisotropic dressing of the polaron. More relevantly for cold-atom setups, quench dynamics is strongly affected by the interplay between dipolar anisotropy and trap geometry. Our findings pave the way for simulating impurities in anisotropic media utilizing experiments with dipolar mixtures."}],"publisher":"SciPost Foundation","date_published":"2023-12-07T00:00:00Z","publication":"SciPost Physics","issue":"6","file_date_updated":"2023-12-11T07:42:04Z","day":"07","_id":"14650","acknowledgement":"We thank Lauriane Chomaz for useful discussions and comments on the manuscript. We also\r\nthank Ragheed Al Hyder for comments on the manuscript.\r\nG.B. acknowledges support from the Austrian Science Fund (FWF),\r\nunder Project No. M2641-N27. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-\r\n390900948 (the Heidelberg STRUCTURES Excellence Cluster). A. G. V. acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the\r\nMarie Skłodowska-Curie Grant Agreement No. 754411. L.A.P.A acknowledges by the PNRR\r\nMUR project PE0000023 - NQSTI and the Deutsche Forschungsgemeinschaft (DFG, German\r\nResearch Foundation) under Germany’s Excellence Strategy - EXC - 2123 Quantum Frontiers390837967 and FOR2247.","publication_identifier":{"issn":["2542-4653"]},"doi":"10.21468/scipostphys.15.6.232","type":"journal_article","department":[{"_id":"MiLe"}],"citation":{"short":"A. Volosniev, G. Bighin, L. Santos, L.A. Peña Ardila, SciPost Physics 15 (2023).","mla":"Volosniev, Artem, et al. “Non-Equilibrium Dynamics of Dipolar Polarons.” <i>SciPost Physics</i>, vol. 15, no. 6, 232, SciPost Foundation, 2023, doi:<a href=\"https://doi.org/10.21468/scipostphys.15.6.232\">10.21468/scipostphys.15.6.232</a>.","ama":"Volosniev A, Bighin G, Santos L, Peña Ardila LA. Non-equilibrium dynamics of dipolar polarons. <i>SciPost Physics</i>. 2023;15(6). doi:<a href=\"https://doi.org/10.21468/scipostphys.15.6.232\">10.21468/scipostphys.15.6.232</a>","apa":"Volosniev, A., Bighin, G., Santos, L., &#38; Peña Ardila, L. A. (2023). Non-equilibrium dynamics of dipolar polarons. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.15.6.232\">https://doi.org/10.21468/scipostphys.15.6.232</a>","ista":"Volosniev A, Bighin G, Santos L, Peña Ardila LA. 2023. Non-equilibrium dynamics of dipolar polarons. SciPost Physics. 15(6), 232.","ieee":"A. Volosniev, G. Bighin, L. Santos, and L. A. Peña Ardila, “Non-equilibrium dynamics of dipolar polarons,” <i>SciPost Physics</i>, vol. 15, no. 6. SciPost Foundation, 2023.","chicago":"Volosniev, Artem, Giacomo Bighin, Luis Santos, and Luisllu A. Peña Ardila. “Non-Equilibrium Dynamics of Dipolar Polarons.” <i>SciPost Physics</i>. SciPost Foundation, 2023. <a href=\"https://doi.org/10.21468/scipostphys.15.6.232\">https://doi.org/10.21468/scipostphys.15.6.232</a>."},"oa":1},{"has_accepted_license":"1","volume":14,"article_number":"006","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","keyword":["General Physics and Astronomy"],"article_type":"original","date_created":"2023-07-24T10:48:23Z","ddc":["530"],"language":[{"iso":"eng"}],"external_id":{"arxiv":["2204.01606"],"isi":["001000325800008"]},"author":[{"full_name":"Rammelmüller, Lukas","first_name":"Lukas","last_name":"Rammelmüller"},{"full_name":"Huber, David","first_name":"David","last_name":"Huber"},{"first_name":"Matija","full_name":"Čufar, Matija","last_name":"Čufar"},{"first_name":"Joachim","full_name":"Brand, Joachim","last_name":"Brand"},{"last_name":"Hammer","first_name":"Hans-Werner","full_name":"Hammer, Hans-Werner"},{"id":"37D278BC-F248-11E8-B48F-1D18A9856A87","full_name":"Volosniev, Artem","first_name":"Artem","orcid":"0000-0003-0393-5525","last_name":"Volosniev"}],"intvolume":"        14","status":"public","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","title":"Magnetic impurity in a one-dimensional few-fermion system","date_published":"2023-01-24T00:00:00Z","publisher":"SciPost Foundation","abstract":[{"lang":"eng","text":"We present a numerical analysis of spin-1/2 fermions in a one-dimensional harmonic potential in the presence of a magnetic point-like impurity at the center of the trap. The model represents a few-body analogue of a magnetic impurity in the vicinity of an s-wave superconductor. Already for a few particles we find a ground-state level crossing between sectors with different fermion parities. We interpret this crossing as a few-body precursor of a quantum phase transition, which occurs when the impurity \"breaks\" a Cooper pair. This picture is further corroborated by analyzing density-density correlations in momentum space. Finally, we discuss how the system may be realized with existing cold-atoms platforms."}],"scopus_import":"1","year":"2023","date_updated":"2023-12-13T11:39:32Z","arxiv":1,"month":"01","isi":1,"oa_version":"Published Version","file":[{"date_created":"2023-07-31T08:44:38Z","relation":"main_file","access_level":"open_access","creator":"dernst","file_id":"13328","success":1,"date_updated":"2023-07-31T08:44:38Z","file_size":1163444,"file_name":"2023_SciPostPhysics_Rammelmueller.pdf","checksum":"ffdb70b9ae7aa45ea4ea6096ecbd6431","content_type":"application/pdf"}],"publication_status":"published","article_processing_charge":"No","oa":1,"type":"journal_article","department":[{"_id":"MiLe"}],"citation":{"ieee":"L. Rammelmüller, D. Huber, M. Čufar, J. Brand, H.-W. Hammer, and A. Volosniev, “Magnetic impurity in a one-dimensional few-fermion system,” <i>SciPost Physics</i>, vol. 14, no. 1. SciPost Foundation, 2023.","chicago":"Rammelmüller, Lukas, David Huber, Matija Čufar, Joachim Brand, Hans-Werner Hammer, and Artem Volosniev. “Magnetic Impurity in a One-Dimensional Few-Fermion System.” <i>SciPost Physics</i>. SciPost Foundation, 2023. <a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">https://doi.org/10.21468/scipostphys.14.1.006</a>.","mla":"Rammelmüller, Lukas, et al. “Magnetic Impurity in a One-Dimensional Few-Fermion System.” <i>SciPost Physics</i>, vol. 14, no. 1, 006, SciPost Foundation, 2023, doi:<a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">10.21468/scipostphys.14.1.006</a>.","ama":"Rammelmüller L, Huber D, Čufar M, Brand J, Hammer H-W, Volosniev A. Magnetic impurity in a one-dimensional few-fermion system. <i>SciPost Physics</i>. 2023;14(1). doi:<a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">10.21468/scipostphys.14.1.006</a>","short":"L. Rammelmüller, D. Huber, M. Čufar, J. Brand, H.-W. Hammer, A. Volosniev, SciPost Physics 14 (2023).","apa":"Rammelmüller, L., Huber, D., Čufar, M., Brand, J., Hammer, H.-W., &#38; Volosniev, A. (2023). Magnetic impurity in a one-dimensional few-fermion system. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">https://doi.org/10.21468/scipostphys.14.1.006</a>","ista":"Rammelmüller L, Huber D, Čufar M, Brand J, Hammer H-W, Volosniev A. 2023. Magnetic impurity in a one-dimensional few-fermion system. SciPost Physics. 14(1), 006."},"doi":"10.21468/scipostphys.14.1.006","publication_identifier":{"issn":["2542-4653"]},"day":"24","_id":"13278","file_date_updated":"2023-07-31T08:44:38Z","issue":"1","publication":"SciPost Physics"},{"oa_version":"Published Version","file":[{"file_id":"9105","creator":"dernst","access_level":"open_access","relation":"main_file","date_created":"2021-02-09T07:06:22Z","content_type":"application/pdf","checksum":"9fd614b7ab49999e7267874df2582f7e","file_name":"2021_SciPostPhysics_Marchukov.pdf","file_size":666512,"success":1,"date_updated":"2021-02-09T07:06:22Z"}],"publication_status":"published","project":[{"call_identifier":"H2020","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","name":"ISTplus - Postdoctoral Fellowships"}],"article_processing_charge":"No","date_published":"2021-02-03T00:00:00Z","publisher":"SciPost Foundation","abstract":[{"text":"We employ the Gross-Pitaevskii equation to study acoustic emission generated in a uniform Bose gas by a static impurity. The impurity excites a sound-wave packet, which propagates through the gas. We calculate the shape of this wave packet in the limit of long wave lengths, and argue that it is possible to extract properties of the impurity by observing this shape. We illustrate here this possibility for a Bose gas with a trapped impurity atom -- an example of a relevant experimental setup. Presented results are general for all one-dimensional systems described by the nonlinear Schrödinger equation and can also be used in nonatomic systems, e.g., to analyze light propagation in nonlinear optical media. Finally, we calculate the shape of the sound-wave packet for a three-dimensional Bose gas assuming a spherically symmetric perturbation.","lang":"eng"}],"scopus_import":"1","year":"2021","date_updated":"2025-04-14T07:43:51Z","arxiv":1,"month":"02","isi":1,"day":"03","_id":"9093","file_date_updated":"2021-02-09T07:06:22Z","issue":"2","publication":"SciPost Physics","oa":1,"citation":{"short":"O. Marchukov, A. Volosniev, SciPost Physics 10 (2021).","mla":"Marchukov, Oleksandr, and Artem Volosniev. “Shape of a Sound Wave in a Weakly-Perturbed Bose Gas.” <i>SciPost Physics</i>, vol. 10, no. 2, 025, SciPost Foundation, 2021, doi:<a href=\"https://doi.org/10.21468/scipostphys.10.2.025\">10.21468/scipostphys.10.2.025</a>.","ama":"Marchukov O, Volosniev A. Shape of a sound wave in a weakly-perturbed Bose gas. <i>SciPost Physics</i>. 2021;10(2). doi:<a href=\"https://doi.org/10.21468/scipostphys.10.2.025\">10.21468/scipostphys.10.2.025</a>","apa":"Marchukov, O., &#38; Volosniev, A. (2021). Shape of a sound wave in a weakly-perturbed Bose gas. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.10.2.025\">https://doi.org/10.21468/scipostphys.10.2.025</a>","ista":"Marchukov O, Volosniev A. 2021. Shape of a sound wave in a weakly-perturbed Bose gas. SciPost Physics. 10(2), 025.","ieee":"O. Marchukov and A. Volosniev, “Shape of a sound wave in a weakly-perturbed Bose gas,” <i>SciPost Physics</i>, vol. 10, no. 2. SciPost Foundation, 2021.","chicago":"Marchukov, Oleksandr, and Artem Volosniev. “Shape of a Sound Wave in a Weakly-Perturbed Bose Gas.” <i>SciPost Physics</i>. SciPost Foundation, 2021. <a href=\"https://doi.org/10.21468/scipostphys.10.2.025\">https://doi.org/10.21468/scipostphys.10.2.025</a>."},"type":"journal_article","department":[{"_id":"MiLe"}],"doi":"10.21468/scipostphys.10.2.025","acknowledgement":"We acknowledge fruitful discussions with Dr. Simos Mistakidis regarding beyond mean-field\r\neffects in our system. We also thank Prof. Maxim Olshanii for valuable suggestions to improve\r\nthe manuscript.O.V.M acknowledges the support from the National Science Foundation\r\nthrough grants No. PHY-1402249, No. PHY-1607221, and No. PHY-1912542 and the\r\nBinational (US-Israel) Science Foundation through grant No. 2015616, as well as by the Israel\r\nScience Foundation (grant No. 1287/17) and from the German Aeronautics and Space Administration\r\n(DLR) through Grant No. 50WM1957. This work has also received funding from\r\nthe DFG Project No.413495248 [VO 2437/1-1] and European Union’s Horizon 2020 research\r\nand innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411\r\n(A. G. V.)","publication_identifier":{"issn":["2542-4653"]},"article_number":"025","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","article_type":"original","date_created":"2021-02-04T12:39:24Z","ddc":["530"],"has_accepted_license":"1","volume":10,"ec_funded":1,"tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"quality_controlled":"1","title":"Shape of a sound wave in a weakly-perturbed Bose gas","language":[{"iso":"eng"}],"author":[{"last_name":"Marchukov","first_name":"Oleksandr","full_name":"Marchukov, Oleksandr"},{"id":"37D278BC-F248-11E8-B48F-1D18A9856A87","last_name":"Volosniev","orcid":"0000-0003-0393-5525","full_name":"Volosniev, Artem","first_name":"Artem"}],"external_id":{"isi":["000646783100027"],"arxiv":["2004.08075"]},"intvolume":"        10","status":"public"},{"publisher":"SciPost Foundation","date_published":"2021-09-02T00:00:00Z","month":"09","isi":1,"date_updated":"2025-05-14T10:51:45Z","arxiv":1,"year":"2021","abstract":[{"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.","lang":"eng"}],"scopus_import":"1","file":[{"file_size":373833,"success":1,"date_updated":"2021-09-02T14:05:43Z","content_type":"application/pdf","file_name":"2021_SciPostPhys_DeNicola.pdf","checksum":"e4ec69d893e31811efc6093cb6ea8eb7","access_level":"open_access","creator":"cchlebak","date_created":"2021-09-02T14:05:43Z","relation":"main_file","file_id":"9984"}],"oa_version":"Published Version","article_processing_charge":"No","project":[{"_id":"260C2330-B435-11E9-9278-68D0E5697425","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411"}],"publication_status":"published","citation":{"ama":"De Nicola S. Importance sampling scheme for the stochastic simulation of quantum spin dynamics. <i>SciPost Physics</i>. 2021;11(3). doi:<a href=\"https://doi.org/10.21468/scipostphys.11.3.048\">10.21468/scipostphys.11.3.048</a>","mla":"De Nicola, Stefano. “Importance Sampling Scheme for the Stochastic Simulation of Quantum Spin Dynamics.” <i>SciPost Physics</i>, vol. 11, no. 3, 048, SciPost Foundation, 2021, doi:<a href=\"https://doi.org/10.21468/scipostphys.11.3.048\">10.21468/scipostphys.11.3.048</a>.","short":"S. De Nicola, SciPost Physics 11 (2021).","ista":"De Nicola S. 2021. Importance sampling scheme for the stochastic simulation of quantum spin dynamics. SciPost Physics. 11(3), 048.","apa":"De Nicola, S. (2021). Importance sampling scheme for the stochastic simulation of quantum spin dynamics. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.11.3.048\">https://doi.org/10.21468/scipostphys.11.3.048</a>","ieee":"S. De Nicola, “Importance sampling scheme for the stochastic simulation of quantum spin dynamics,” <i>SciPost Physics</i>, vol. 11, no. 3. SciPost Foundation, 2021.","chicago":"De Nicola, Stefano. “Importance Sampling Scheme for the Stochastic Simulation of Quantum Spin Dynamics.” <i>SciPost Physics</i>. SciPost Foundation, 2021. <a href=\"https://doi.org/10.21468/scipostphys.11.3.048\">https://doi.org/10.21468/scipostphys.11.3.048</a>."},"type":"journal_article","department":[{"_id":"MaSe"}],"oa":1,"publication_identifier":{"eissn":["2666-9366"],"issn":["2542-4653"]},"doi":"10.21468/scipostphys.11.3.048","day":"02","_id":"9981","publication":"SciPost Physics","issue":"3","file_date_updated":"2021-09-02T14:05:43Z","has_accepted_license":"1","ec_funded":1,"volume":11,"keyword":["General Physics and Astronomy"],"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_number":"048","ddc":["519"],"date_created":"2021-09-02T11:49:47Z","article_type":"original","author":[{"id":"42832B76-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4842-6671","last_name":"De Nicola","first_name":"Stefano","full_name":"De Nicola, Stefano"}],"external_id":{"arxiv":["2103.16468"],"isi":["000692534200001"]},"language":[{"iso":"eng"}],"status":"public","intvolume":"        11","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"title":"Importance sampling scheme for the stochastic simulation of quantum spin dynamics","quality_controlled":"1"},{"quality_controlled":"1","title":"Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps","tmp":{"short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","image":"/images/cc_by.png","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"status":"public","intvolume":"         9","language":[{"iso":"eng"}],"external_id":{"isi":["000557362300008"]},"author":[{"full_name":"Gulden, Tobias","first_name":"Tobias","last_name":"Gulden","orcid":"0000-0001-6814-7541","id":"1083E038-9F73-11E9-A4B5-532AE6697425"},{"first_name":"Erez","full_name":"Berg, Erez","last_name":"Berg"},{"first_name":"Mark Spencer","full_name":"Rudner, Mark Spencer","last_name":"Rudner"},{"full_name":"Lindner, Netanel","first_name":"Netanel","last_name":"Lindner"}],"date_created":"2020-08-04T13:04:15Z","ddc":["530"],"corr_author":"1","article_type":"original","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","article_number":"015","ec_funded":1,"volume":9,"has_accepted_license":"1","publication":"SciPost Physics","file_date_updated":"2020-08-06T08:56:06Z","_id":"8199","day":"29","doi":"10.21468/scipostphys.9.1.015","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","publication_identifier":{"issn":["2542-4653"]},"type":"journal_article","department":[{"_id":"MaSe"}],"citation":{"chicago":"Gulden, Tobias, Erez Berg, Mark Spencer Rudner, and Netanel Lindner. “Exponentially Long Lifetime of Universal Quasi-Steady States in Topological Floquet Pumps.” <i>SciPost Physics</i>. SciPost Foundation, 2020. <a href=\"https://doi.org/10.21468/scipostphys.9.1.015\">https://doi.org/10.21468/scipostphys.9.1.015</a>.","ieee":"T. Gulden, E. Berg, M. S. Rudner, and N. Lindner, “Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps,” <i>SciPost Physics</i>, 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.","apa":"Gulden, T., Berg, E., Rudner, M. S., &#38; Lindner, N. (2020). Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.9.1.015\">https://doi.org/10.21468/scipostphys.9.1.015</a>","short":"T. Gulden, E. Berg, M.S. Rudner, N. Lindner, SciPost Physics 9 (2020).","ama":"Gulden T, Berg E, Rudner MS, Lindner N. Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps. <i>SciPost Physics</i>. 2020;9. doi:<a href=\"https://doi.org/10.21468/scipostphys.9.1.015\">10.21468/scipostphys.9.1.015</a>","mla":"Gulden, Tobias, et al. “Exponentially Long Lifetime of Universal Quasi-Steady States in Topological Floquet Pumps.” <i>SciPost Physics</i>, vol. 9, 015, SciPost Foundation, 2020, doi:<a href=\"https://doi.org/10.21468/scipostphys.9.1.015\">10.21468/scipostphys.9.1.015</a>."},"oa":1,"article_processing_charge":"No","project":[{"grant_number":"754411","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","_id":"260C2330-B435-11E9-9278-68D0E5697425"}],"publication_status":"published","oa_version":"Published Version","file":[{"file_name":"2020_SciPostPhys_Gulden.pdf","content_type":"application/pdf","date_updated":"2020-08-06T08:56:06Z","success":1,"file_size":531137,"file_id":"8202","date_created":"2020-08-06T08:56:06Z","relation":"main_file","access_level":"open_access","creator":"dernst"}],"date_updated":"2025-04-14T07:44:05Z","month":"07","isi":1,"scopus_import":"1","year":"2020","abstract":[{"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.","lang":"eng"}],"date_published":"2020-07-29T00:00:00Z","publisher":"SciPost Foundation"}]