[{"OA_place":"publisher","project":[{"name":"Angulon: physics and applications of a new quasiparticle","call_identifier":"H2020","_id":"2688CF98-B435-11E9-9278-68D0E5697425","grant_number":"801770"}],"date_updated":"2026-03-16T12:21:55Z","author":[{"orcid":"0000-0002-6963-0129","first_name":"Volker","last_name":"Karle","full_name":"Karle, Volker","id":"D7C012AE-D7ED-11E9-95E8-1EC5E5697425"},{"id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","full_name":"Lemeshko, Mikhail","last_name":"Lemeshko","first_name":"Mikhail","orcid":"0000-0002-6990-7802"},{"last_name":"Bouhon","full_name":"Bouhon, Adrien","first_name":"Adrien"},{"first_name":"Robert-Jan","full_name":"Slager, Robert-Jan","last_name":"Slager"},{"first_name":"F. Nur","full_name":"Ünal, F. Nur","last_name":"Ünal"}],"date_published":"2026-01-12T00:00:00Z","ddc":["530"],"oa_version":"Published Version","scopus_import":"1","has_accepted_license":"1","month":"01","PlanS_conform":"1","external_id":{"arxiv":["2408.16848"]},"language":[{"iso":"eng"}],"acknowledgement":"We thank G. M. Koutentakis, S. Wimberger, J. G. E. Harris, T. Enss, and A. Ghazaryan for fruitful discussions. M.L. acknowledges support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). R.-J.S. acknowledges funding from a EPSRC ERC underwrite (Grant No. EP/X025829/1), a EPSRC New Investigator Award (Grant No. EP/W00187X/1), and Trinity College, Cambridge. F.N.Ü. acknowledges support from the Marie Skłodowska-Curie Programme of the European Commission (Grant No. 893915), a Simons Investigator Award (Grant No. 511029), Trinity College Cambridge, and the Royal Society (Grant No. URF/R1/241667).","license":"https://creativecommons.org/licenses/by/4.0/","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"doi":"10.1103/db9d-9bns","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"department":[{"_id":"MiLe"}],"article_number":"012216","_id":"21009","abstract":[{"lang":"eng","text":"We demonstrate that periodically driven quantum rotors provide a promising and broadly applicable platform to implement multigap topological phases, where groups of bands can acquire topological invariants due to non-Abelian braiding of band degeneracies. By adiabatically varying the periodic kicks to the rotor we find nodal-line braiding, which causes sign flips of topological charges of band nodes and can prevent them from annihilating, indicated by nonzero values of the patch Euler class. In particular, we report on the emergence of an anomalous Dirac string phase arising in the strongly driven regime, a truly out-of-equilibrium phase of the quantum rotor. This phase emanates from braiding processes involving all (quasienergy) gaps and manifests itself with edge states at zero angular momentum. Our results reveal direct applications in state-of-the-art experiments of quantum rotors, such as linear molecules driven by periodic far-off-resonant laser pulses or artificial quantum rotors in optical lattices, whose extensive versatility offers precise modification and observation of novel non-Abelian topological properties."}],"intvolume":"       113","status":"public","publication_status":"published","file":[{"relation":"main_file","content_type":"application/pdf","file_name":"2026_PhysicalReviewA_Karle.pdf","date_created":"2026-01-21T09:04:48Z","creator":"dernst","success":1,"date_updated":"2026-01-21T09:04:48Z","file_size":2650256,"checksum":"ca62a5050a234c0554e2583b1c126057","file_id":"21029","access_level":"open_access"}],"arxiv":1,"volume":113,"day":"12","type":"journal_article","OA_type":"hybrid","article_processing_charge":"Yes (via OA deal)","issue":"1","publication":"Physical Review A","publisher":"American Physical Society","citation":{"ista":"Karle V, Lemeshko M, Bouhon A, Slager R-J, Ünal FN. 2026. Anomalous multigap topological phases in periodically driven quantum rotors. Physical Review A. 113(1), 012216.","ama":"Karle V, Lemeshko M, Bouhon A, Slager R-J, Ünal FN. Anomalous multigap topological phases in periodically driven quantum rotors. <i>Physical Review A</i>. 2026;113(1). doi:<a href=\"https://doi.org/10.1103/db9d-9bns\">10.1103/db9d-9bns</a>","chicago":"Karle, Volker, Mikhail Lemeshko, Adrien Bouhon, Robert-Jan Slager, and F. Nur Ünal. “Anomalous Multigap Topological Phases in Periodically Driven Quantum Rotors.” <i>Physical Review A</i>. American Physical Society, 2026. <a href=\"https://doi.org/10.1103/db9d-9bns\">https://doi.org/10.1103/db9d-9bns</a>.","apa":"Karle, V., Lemeshko, M., Bouhon, A., Slager, R.-J., &#38; Ünal, F. N. (2026). Anomalous multigap topological phases in periodically driven quantum rotors. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/db9d-9bns\">https://doi.org/10.1103/db9d-9bns</a>","mla":"Karle, Volker, et al. “Anomalous Multigap Topological Phases in Periodically Driven Quantum Rotors.” <i>Physical Review A</i>, vol. 113, no. 1, 012216, American Physical Society, 2026, doi:<a href=\"https://doi.org/10.1103/db9d-9bns\">10.1103/db9d-9bns</a>.","short":"V. Karle, M. Lemeshko, A. Bouhon, R.-J. Slager, F.N. Ünal, Physical Review A 113 (2026).","ieee":"V. Karle, M. Lemeshko, A. Bouhon, R.-J. Slager, and F. N. Ünal, “Anomalous multigap topological phases in periodically driven quantum rotors,” <i>Physical Review A</i>, vol. 113, no. 1. American Physical Society, 2026."},"oa":1,"quality_controlled":"1","corr_author":"1","article_type":"original","date_created":"2026-01-20T10:06:07Z","year":"2026","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","file_date_updated":"2026-01-21T09:04:48Z","ec_funded":1,"title":"Anomalous multigap topological phases in periodically driven quantum rotors"},{"doi":"10.1103/PhysRevA.111.013303","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"acknowledgement":"We thank J. Cremon and J. Bjerlin for earlier contributions to the configuration-interaction calculations used in this work (see Refs. [49,50]). F.B. and S.M.R. acknowledge helpful discussions with Carl Heintze, Sandra Brandstetter, and Lila Chergui. We further want to thank Lila Chergui for helpful comments on the paper. This research was financially supported by the Knut and Alice Wallenberg Foundation (Grant No. KAW 2018.0217) and the Swedish Research Council (Grant No. 2022-03654 VR).","article_number":"013303","department":[{"_id":"MiLe"}],"isi":1,"date_published":"2025-01-03T00:00:00Z","author":[{"first_name":"Fabian","full_name":"Brauneis, Fabian","last_name":"Brauneis"},{"last_name":"Hammer","full_name":"Hammer, Hans Werner","first_name":"Hans Werner"},{"full_name":"Reimann, Stephanie M.","last_name":"Reimann","first_name":"Stephanie M."},{"orcid":"0000-0003-0393-5525","first_name":"Artem","full_name":"Volosniev, Artem","last_name":"Volosniev","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"}],"OA_place":"repository","date_updated":"2025-02-27T12:41:58Z","language":[{"iso":"eng"}],"external_id":{"isi":["001398791400004"],"arxiv":["2408.10052"]},"month":"01","oa_version":"Preprint","scopus_import":"1","date_created":"2025-01-12T23:04:00Z","year":"2025","quality_controlled":"1","article_type":"original","oa":1,"citation":{"ama":"Brauneis F, Hammer HW, Reimann SM, Volosniev A. Comparison of renormalized interactions using one-dimensional few-body systems as a testbed. <i>Physical Review A</i>. 2025;111(1). doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.013303\">10.1103/PhysRevA.111.013303</a>","ista":"Brauneis F, Hammer HW, Reimann SM, Volosniev A. 2025. Comparison of renormalized interactions using one-dimensional few-body systems as a testbed. Physical Review A. 111(1), 013303.","apa":"Brauneis, F., Hammer, H. W., Reimann, S. M., &#38; Volosniev, A. (2025). Comparison of renormalized interactions using one-dimensional few-body systems as a testbed. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.111.013303\">https://doi.org/10.1103/PhysRevA.111.013303</a>","chicago":"Brauneis, Fabian, Hans Werner Hammer, Stephanie M. Reimann, and Artem Volosniev. “Comparison of Renormalized Interactions Using One-Dimensional Few-Body Systems as a Testbed.” <i>Physical Review A</i>. American Physical Society, 2025. <a href=\"https://doi.org/10.1103/PhysRevA.111.013303\">https://doi.org/10.1103/PhysRevA.111.013303</a>.","mla":"Brauneis, Fabian, et al. “Comparison of Renormalized Interactions Using One-Dimensional Few-Body Systems as a Testbed.” <i>Physical Review A</i>, vol. 111, no. 1, 013303, American Physical Society, 2025, doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.013303\">10.1103/PhysRevA.111.013303</a>.","ieee":"F. Brauneis, H. W. Hammer, S. M. Reimann, and A. Volosniev, “Comparison of renormalized interactions using one-dimensional few-body systems as a testbed,” <i>Physical Review A</i>, vol. 111, no. 1. American Physical Society, 2025.","short":"F. Brauneis, H.W. Hammer, S.M. Reimann, A. Volosniev, Physical Review A 111 (2025)."},"title":"Comparison of renormalized interactions using one-dimensional few-body systems as a testbed","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","arxiv":1,"publication_status":"published","_id":"18821","abstract":[{"lang":"eng","text":"Even though the one-dimensional contact interaction requires no regularization, renormalization methods have been shown to improve the convergence of numerical calculations considerably. In this work, we compare and contrast these methods: “the running coupling constant” where the two-body ground-state energy is used as a renormalization condition, and two effective interaction approaches that include information about the ground as well as excited states. In particular, we calculate the energies and densities of few-fermion systems in a harmonic oscillator with the configuration-interaction method and compare the results based upon renormalized and bare interactions. We find that the use of the running coupling constant instead of the bare interaction improves convergence significantly. A comparison with an effective interaction, which is designed to reproduce the relative part of the energy spectrum of two particles, showed a similar improvement. The effective interaction provides an additional improvement if the center-of-mass excitations are included in the construction. Finally, we discuss the transformation of observables alongside the renormalization of the potential, and demonstrate that this might be an essential ingredient for accurate numerical calculations."}],"intvolume":"       111","status":"public","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2408.10052"}],"issue":"1","publication":"Physical Review A","publisher":"American Physical Society","OA_type":"green","article_processing_charge":"No","type":"journal_article","volume":111,"day":"03"},{"type":"journal_article","day":"21","volume":111,"publisher":"American Physical Society","publication":"Physical Review A","issue":"3","article_processing_charge":"No","OA_type":"green","status":"public","_id":"19502","intvolume":"       111","abstract":[{"lang":"eng","text":"Alkali dimers, Ak2, located on the surface of a helium nanodroplet, are set into rotation through the polarizability interaction with a nonresonant 1-ps-long laser pulse. The time-dependent degree of alignment is recorded using femtosecond-probe-pulse-induced Coulomb explosion into a pair of Ak+ fragment ions. The results, obtained for Na2, K2, and Rb2 in both the ground state 11Σ+g and the lowest-lying triplet state 13Σ+u, exhibit distinct, periodic revivals with a gradually decreasing amplitude. The dynamics differ from that expected for dimers had they behaved as free rotors. Numerically, we solve the time-dependent rotational Schrödinger equation, including an effective mean-field potential to describe the interaction between the dimer and the droplet. The experimental and simulated alignment dynamics agree well and their comparison enables us to determine the effective rotational constants of the alkali dimers with the exception of Rb2(13Σ+u) that only exhibits a prompt alignment peak but no subsequent revivals. For Na2(13Σ+u), K2(11Σ+g), K2(13Σ+u) and Rb2(11Σ+g), the alignment dynamics are well-described by a 2D rotor model. We ascribe this to a significant confinement of the internuclear axis of these dimers, induced by the orientation-dependent droplet-dimer interaction, to the tangential plane of their residence point on the droplet."}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2502.14521"}],"arxiv":1,"publication_status":"published","title":"Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the surface of a helium droplet","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","oa":1,"citation":{"short":"H.H. Kristensen, L. Kranabetter, A. Ghazaryan, C.A. Schouder, E. Hansen, F. Jensen, R.E. Zillich, M. Lemeshko, H. Stapelfeldt, Physical Review A 111 (2025).","mla":"Kristensen, Henrik H., et al. “Nonadiabatic Laser-Induced Alignment Dynamics of Alkali-Metal Dimers on the Surface of a Helium Droplet.” <i>Physical Review A</i>, vol. 111, no. 3, 033114, American Physical Society, 2025, doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.033114\">10.1103/PhysRevA.111.033114</a>.","ieee":"H. H. Kristensen <i>et al.</i>, “Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the surface of a helium droplet,” <i>Physical Review A</i>, vol. 111, no. 3. American Physical Society, 2025.","ama":"Kristensen HH, Kranabetter L, Ghazaryan A, et al. Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the surface of a helium droplet. <i>Physical Review A</i>. 2025;111(3). doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.033114\">10.1103/PhysRevA.111.033114</a>","ista":"Kristensen HH, Kranabetter L, Ghazaryan A, Schouder CA, Hansen E, Jensen F, Zillich RE, Lemeshko M, Stapelfeldt H. 2025. Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the surface of a helium droplet. Physical Review A. 111(3), 033114.","apa":"Kristensen, H. H., Kranabetter, L., Ghazaryan, A., Schouder, C. A., Hansen, E., Jensen, F., … Stapelfeldt, H. (2025). Nonadiabatic laser-induced alignment dynamics of alkali-metal dimers on the surface of a helium droplet. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.111.033114\">https://doi.org/10.1103/PhysRevA.111.033114</a>","chicago":"Kristensen, Henrik H., Lorenz Kranabetter, Areg Ghazaryan, Constant A. Schouder, Emil Hansen, Frank Jensen, Robert E. Zillich, Mikhail Lemeshko, and Henrik Stapelfeldt. “Nonadiabatic Laser-Induced Alignment Dynamics of Alkali-Metal Dimers on the Surface of a Helium Droplet.” <i>Physical Review A</i>. American Physical Society, 2025. <a href=\"https://doi.org/10.1103/PhysRevA.111.033114\">https://doi.org/10.1103/PhysRevA.111.033114</a>."},"year":"2025","date_created":"2025-04-06T22:01:32Z","article_type":"original","quality_controlled":"1","month":"03","oa_version":"Preprint","scopus_import":"1","language":[{"iso":"eng"}],"external_id":{"arxiv":["2502.14521"],"isi":["001459727400007"]},"date_updated":"2025-09-30T11:27:25Z","OA_place":"repository","date_published":"2025-03-21T00:00:00Z","author":[{"full_name":"Kristensen, Henrik H.","last_name":"Kristensen","first_name":"Henrik H."},{"last_name":"Kranabetter","full_name":"Kranabetter, Lorenz","first_name":"Lorenz"},{"full_name":"Ghazaryan, Areg","id":"4AF46FD6-F248-11E8-B48F-1D18A9856A87","last_name":"Ghazaryan","first_name":"Areg","orcid":"0000-0001-9666-3543"},{"full_name":"Schouder, Constant A.","last_name":"Schouder","first_name":"Constant A."},{"first_name":"Emil","full_name":"Hansen, Emil","last_name":"Hansen"},{"first_name":"Frank","full_name":"Jensen, Frank","last_name":"Jensen"},{"last_name":"Zillich","full_name":"Zillich, Robert E.","first_name":"Robert E."},{"orcid":"0000-0002-6990-7802","first_name":"Mikhail","last_name":"Lemeshko","full_name":"Lemeshko, Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Stapelfeldt, Henrik","last_name":"Stapelfeldt","first_name":"Henrik"}],"department":[{"_id":"MiLe"}],"isi":1,"article_number":"033114","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"acknowledgement":"H.S. acknowledges support from the Villum Foundation through a Villum Investigator Grant No. 25886. We thank Jan Thøgersen for expert help with the optics and the laser system.","doi":"10.1103/PhysRevA.111.033114"},{"title":"Direct and efficient detection of quantum superposition","file_date_updated":"2025-05-28T09:16:03Z","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","year":"2025","date_created":"2025-05-25T22:16:54Z","article_type":"letter_note","quality_controlled":"1","oa":1,"citation":{"mla":"Kun, Daniel, et al. “Direct and Efficient Detection of Quantum Superposition.” <i>Physical Review A</i>, vol. 111, no. 5, L050402, American Physical Society, 2025, doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.L050402\">10.1103/PhysRevA.111.L050402</a>.","ieee":"D. Kun, K. T. Strömberg, M. Spagnolo, B. Dakić, L. A. Rozema, and P. Walther, “Direct and efficient detection of quantum superposition,” <i>Physical Review A</i>, vol. 111, no. 5. American Physical Society, 2025.","short":"D. Kun, K.T. Strömberg, M. Spagnolo, B. Dakić, L.A. Rozema, P. Walther, Physical Review A 111 (2025).","ama":"Kun D, Strömberg KT, Spagnolo M, Dakić B, Rozema LA, Walther P. Direct and efficient detection of quantum superposition. <i>Physical Review A</i>. 2025;111(5). doi:<a href=\"https://doi.org/10.1103/PhysRevA.111.L050402\">10.1103/PhysRevA.111.L050402</a>","ista":"Kun D, Strömberg KT, Spagnolo M, Dakić B, Rozema LA, Walther P. 2025. Direct and efficient detection of quantum superposition. Physical Review A. 111(5), L050402.","apa":"Kun, D., Strömberg, K. T., Spagnolo, M., Dakić, B., Rozema, L. A., &#38; Walther, P. (2025). Direct and efficient detection of quantum superposition. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.111.L050402\">https://doi.org/10.1103/PhysRevA.111.L050402</a>","chicago":"Kun, Daniel, Karl T Strömberg, Michele Spagnolo, Borivoje Dakić, Lee A. Rozema, and Philip Walther. “Direct and Efficient Detection of Quantum Superposition.” <i>Physical Review A</i>. American Physical Society, 2025. <a href=\"https://doi.org/10.1103/PhysRevA.111.L050402\">https://doi.org/10.1103/PhysRevA.111.L050402</a>."},"publisher":"American Physical Society","issue":"5","publication":"Physical Review A","article_processing_charge":"No","OA_type":"hybrid","type":"journal_article","day":"16","volume":111,"arxiv":1,"file":[{"file_id":"19755","access_level":"open_access","checksum":"b83295a8f597b7781d8e7bfa3b393b42","file_size":571784,"creator":"dernst","success":1,"date_updated":"2025-05-28T09:16:03Z","relation":"main_file","content_type":"application/pdf","file_name":"2025_PhysReviewA_Kun.pdf","date_created":"2025-05-28T09:16:03Z"}],"publication_status":"published","status":"public","abstract":[{"text":"One of the most striking quantum phenomena is superposition, where one particle simultaneously inhabits different states. Most methods to verify coherent superposition are indirect, in that they require the distinct states to be recombined. Here, we adapt an xor game, in which a “test” photon is placed in a superposition of two orthogonal spatial modes, and each mode is sent to separated parties who perform local measurements on their modes without reinterfering the original modes. We show that by using a second identical “measurement” photon the parties are nonetheless able to verify if the test photon was placed in coherent superposition of the two spatial modes. We then turn this game into a resource-efficient verification scheme, obtaining a confidence that the particle is superposed which approaches unity exponentially fast. We demonstrate our scheme using a single photon, obtaining a 99% confidence that the particle is superposed with only 37 copies. Our work shows the utility of xor games to verify quantum resources, allowing us to efficiently detect quantum superposition without reinterfering the superposed modes.","lang":"eng"}],"_id":"19733","intvolume":"       111","article_number":"L050402","department":[{"_id":"OnHo"}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"isi":1,"doi":"10.1103/PhysRevA.111.L050402","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"acknowledgement":"This project has received funding from the European Union's Horizon 2020 and Horizon Europe research and innovation programmes under Grant Agreements No. 899368 (EPIQUS) and No. 101135288 (EPIQUE), the Marie Skłodowska-Curie Grant Agreement No. 956071 (AppQInfo), and the QuantERA II Programme under Grant Agreement No. 101017733 (PhoMemtor). The financial support by the Austrian Federal Ministry of Labour and Economy, the National Foundation for Research, Technology and Development, and the Christian Doppler Research Association is gratefully acknowledged. L.A.R. acknowledges support from the Erwin Schrödinger Center for Quantum Science & Technology (ESQ Discovery). This research was funded in whole or in part from the Austrian Science Fund (FWF) through [Grant No. 10.55776/COE1] (Quantum Science Austria), [Grant No. 10.55776/F71] (BeyondC), [Grant No. 10.55776/FG5] (Research Group 5), [Grant No. 10.55776/I6002] (PhoMemtor), and [Grant No. 10.55776/P36994] (Quantum Interference).","language":[{"iso":"eng"}],"external_id":{"isi":["001501941500006"],"arxiv":["2405.08065"]},"month":"05","has_accepted_license":"1","scopus_import":"1","oa_version":"Published Version","ddc":["530"],"date_published":"2025-05-16T00:00:00Z","author":[{"last_name":"Kun","full_name":"Kun, Daniel","first_name":"Daniel"},{"id":"68011cd2-da32-11ee-a930-b2774c7aba5f","full_name":"Strömberg, Karl T","last_name":"Strömberg","first_name":"Karl T"},{"last_name":"Spagnolo","full_name":"Spagnolo, Michele","first_name":"Michele"},{"full_name":"Dakić, Borivoje","last_name":"Dakić","first_name":"Borivoje"},{"last_name":"Rozema","full_name":"Rozema, Lee A.","first_name":"Lee A."},{"last_name":"Walther","full_name":"Walther, Philip","first_name":"Philip"}],"date_updated":"2025-09-30T12:40:18Z","OA_place":"publisher"},{"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","title":"Anisotropic potential immersed in a dipolar Bose-Einstein condensate","citation":{"ieee":"N. Shukla, A. Volosniev, and J. R. Armstrong, “Anisotropic potential immersed in a dipolar Bose-Einstein condensate,” <i>Physical Review A</i>, vol. 110, no. 5. American Physical Society, 2024.","short":"N. Shukla, A. Volosniev, J.R. Armstrong, Physical Review A 110 (2024).","mla":"Shukla, Neelam, et al. “Anisotropic Potential Immersed in a Dipolar Bose-Einstein Condensate.” <i>Physical Review A</i>, vol. 110, no. 5, 053317, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevA.110.053317\">10.1103/PhysRevA.110.053317</a>.","ama":"Shukla N, Volosniev A, Armstrong JR. Anisotropic potential immersed in a dipolar Bose-Einstein condensate. <i>Physical Review A</i>. 2024;110(5). doi:<a href=\"https://doi.org/10.1103/PhysRevA.110.053317\">10.1103/PhysRevA.110.053317</a>","ista":"Shukla N, Volosniev A, Armstrong JR. 2024. Anisotropic potential immersed in a dipolar Bose-Einstein condensate. Physical Review A. 110(5), 053317.","apa":"Shukla, N., Volosniev, A., &#38; Armstrong, J. R. (2024). Anisotropic potential immersed in a dipolar Bose-Einstein condensate. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.110.053317\">https://doi.org/10.1103/PhysRevA.110.053317</a>","chicago":"Shukla, Neelam, Artem Volosniev, and Jeremy R. Armstrong. “Anisotropic Potential Immersed in a Dipolar Bose-Einstein Condensate.” <i>Physical Review A</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevA.110.053317\">https://doi.org/10.1103/PhysRevA.110.053317</a>."},"oa":1,"article_type":"original","quality_controlled":"1","year":"2024","date_created":"2024-12-08T23:01:55Z","day":"18","volume":110,"type":"journal_article","article_processing_charge":"No","OA_type":"green","publisher":"American Physical Society","publication":"Physical Review A","issue":"5","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2406.00217","open_access":"1"}],"status":"public","abstract":[{"lang":"eng","text":"We study a three-dimensional Gross-Pitaevskii equation that describes a static impurity in a dipolar Bose-Einstein condensate. Our focus is on the interplay between the shape of the impurity and the anisotropy of the medium manifested in the energy and the density of the system. Without external confinement, properties of the system are derived with basic analytical approaches. For a system in a harmonic trap, the model is investigated numerically, using the split-step Crank-Nicolson method. Our results demonstrate that the impurity self-energy is minimized when its shape more closely aligns with the anisotropic character of the bath; in particular a prolate deformed impurity aligned with the direction of the dipoles has the smallest self-energy for a repulsive impurity. Our work complements studies of impurities in Bose gases with zero-range interactions and paves the way for studies of dipolar polarons with a Gross-Pitaevskii equation."}],"_id":"18629","intvolume":"       110","publication_status":"published","arxiv":1,"department":[{"_id":"MiLe"}],"isi":1,"article_number":"053317","acknowledgement":"The authors acknowledge that this material is based upon work supported by the National Science Foundation/EPSCoR RII Track-1: Emergent Quantum Materials and Technologies (EQUATE), Award No. OIA-2044049.","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.110.053317","scopus_import":"1","oa_version":"Preprint","month":"11","external_id":{"isi":["001362623400019"],"arxiv":["2406.00217"]},"language":[{"iso":"eng"}],"date_updated":"2025-09-08T14:56:22Z","OA_place":"repository","author":[{"full_name":"Shukla, Neelam","last_name":"Shukla","first_name":"Neelam"},{"last_name":"Volosniev","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","full_name":"Volosniev, Artem","orcid":"0000-0003-0393-5525","first_name":"Artem"},{"first_name":"Jeremy R.","last_name":"Armstrong","full_name":"Armstrong, Jeremy R."}],"date_published":"2024-11-18T00:00:00Z"},{"article_number":"033315","isi":1,"department":[{"_id":"MiLe"}],"doi":"10.1103/PhysRevA.109.033315","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"acknowledgement":"We thank Félix Werner and Kris Van Houcke for interesting discussions.","language":[{"iso":"eng"}],"external_id":{"arxiv":["2311.14536"],"isi":["001198511300017"]},"month":"03","oa_version":"Preprint","scopus_import":"1","date_published":"2024-03-19T00:00:00Z","author":[{"first_name":"Ragheed","full_name":"Al Hyder, Ragheed","last_name":"Al Hyder","id":"d1c405be-ae15-11ed-8510-ccf53278162e"},{"last_name":"Chevy","full_name":"Chevy, F.","first_name":"F."},{"first_name":"X.","full_name":"Leyronas, X.","last_name":"Leyronas"}],"date_updated":"2025-09-04T13:07:33Z","title":"Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_created":"2024-03-24T23:00:59Z","year":"2024","quality_controlled":"1","corr_author":"1","article_type":"original","oa":1,"citation":{"ieee":"R. Al Hyder, F. Chevy, and X. Leyronas, “Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy,” <i>Physical Review A</i>, vol. 109, no. 3. American Physical Society, 2024.","short":"R. Al Hyder, F. Chevy, X. Leyronas, Physical Review A 109 (2024).","mla":"Al Hyder, Ragheed, et al. “Exploring Beyond-Mean-Field Logarithmic Divergences in Fermi-Polaron Energy.” <i>Physical Review A</i>, vol. 109, no. 3, 033315, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevA.109.033315\">10.1103/PhysRevA.109.033315</a>.","ama":"Al Hyder R, Chevy F, Leyronas X. Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy. <i>Physical Review A</i>. 2024;109(3). doi:<a href=\"https://doi.org/10.1103/PhysRevA.109.033315\">10.1103/PhysRevA.109.033315</a>","ista":"Al Hyder R, Chevy F, Leyronas X. 2024. Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy. Physical Review A. 109(3), 033315.","apa":"Al Hyder, R., Chevy, F., &#38; Leyronas, X. (2024). Exploring beyond-mean-field logarithmic divergences in Fermi-polaron energy. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.109.033315\">https://doi.org/10.1103/PhysRevA.109.033315</a>","chicago":"Al Hyder, Ragheed, F. Chevy, and X. Leyronas. “Exploring Beyond-Mean-Field Logarithmic Divergences in Fermi-Polaron Energy.” <i>Physical Review A</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevA.109.033315\">https://doi.org/10.1103/PhysRevA.109.033315</a>."},"issue":"3","publication":"Physical Review A","publisher":"American Physical Society","article_processing_charge":"No","type":"journal_article","volume":109,"day":"19","arxiv":1,"publication_status":"published","_id":"15167","abstract":[{"text":"We perform a diagrammatic analysis of the energy of a mobile impurity immersed in a strongly interacting two-component Fermi gas to second order in the impurity-bath interaction. These corrections demonstrate divergent behavior in the limit of large impurity momentum. We show the fundamental processes responsible for these logarithmically divergent terms. We study the problem in the general case without any assumptions regarding the fermion-fermion interactions in the bath. We show that the divergent term can be summed up to all orders in the Fermi-Fermi interaction and that the resulting expression is equivalent to the one obtained in the few-body calculation. Finally, we provide a perturbative calculation to the second order in the Fermi-Fermi interaction, and we show the diagrams responsible for these terms.","lang":"eng"}],"intvolume":"       109","status":"public","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2311.14536","open_access":"1"}]},{"title":"Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics","ec_funded":1,"related_material":{"record":[{"status":"public","id":"19393","relation":"dissertation_contains"}]},"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","date_created":"2024-02-18T23:01:01Z","year":"2024","corr_author":"1","quality_controlled":"1","article_type":"original","oa":1,"citation":{"apa":"Karle, V., &#38; Lemeshko, M. (2024). Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.109.023101\">https://doi.org/10.1103/PhysRevA.109.023101</a>","chicago":"Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks: Reevaluating the Impulsive Limit in Molecular Rotational Dynamics.” <i>Physical Review A</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/PhysRevA.109.023101\">https://doi.org/10.1103/PhysRevA.109.023101</a>.","ama":"Karle V, Lemeshko M. Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. <i>Physical Review A</i>. 2024;109(2). doi:<a href=\"https://doi.org/10.1103/PhysRevA.109.023101\">10.1103/PhysRevA.109.023101</a>","ista":"Karle V, Lemeshko M. 2024. Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. Physical Review A. 109(2), 023101.","short":"V. Karle, M. Lemeshko, Physical Review A 109 (2024).","ieee":"V. Karle and M. Lemeshko, “Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics,” <i>Physical Review A</i>, vol. 109, no. 2. American Physical Society, 2024.","mla":"Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks: Reevaluating the Impulsive Limit in Molecular Rotational Dynamics.” <i>Physical Review A</i>, vol. 109, no. 2, 023101, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/PhysRevA.109.023101\">10.1103/PhysRevA.109.023101</a>."},"publication":"Physical Review A","issue":"2","publisher":"American Physical Society","article_processing_charge":"No","type":"journal_article","volume":109,"day":"01","arxiv":1,"publication_status":"published","intvolume":"       109","_id":"15004","abstract":[{"text":"The impulsive limit (the “sudden approximation”) has been widely employed to describe the interaction between molecules and short, far-off-resonant laser pulses. This approximation assumes that the timescale of the laser-molecule interaction is significantly shorter than the internal rotational period of the molecule, resulting in the rotational motion being instantaneously “frozen” during the interaction. This simplified description of the laser-molecule interaction is incorporated in various theoretical models predicting rotational dynamics of molecules driven by short laser pulses. In this theoretical work, we develop an effective theory for ultrashort laser pulses by examining the full time-evolution operator and solving the time-dependent Schrödinger equation at the operator level. Our findings reveal a critical angular momentum, lcrit, at which the impulsive limit breaks down. In other words, the validity of the sudden approximation depends not only on the pulse duration but also on its intensity, since the latter determines how many angular momentum states are populated. We explore both ultrashort multicycle (Gaussian) pulses and the somewhat less studied half-cycle pulses, which produce distinct effective potentials. We discuss the limitations of the impulsive limit and propose a method that rescales the effective matrix elements, enabling an improved and more accurate description of laser-molecule interactions.","lang":"eng"}],"status":"public","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2307.07256","open_access":"1"}],"article_number":"023101","department":[{"_id":"MiLe"}],"isi":1,"doi":"10.1103/PhysRevA.109.023101","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"acknowledgement":"We thank Bretislav Friedrich, Marjan Mirahmadi, Artem Volosniev, and Burkhard Schmidt for insightful discussions. M.L. acknowledges support by the European Research Council (ERC) under Starting Grant No. 801770 (ANGULON).","language":[{"iso":"eng"}],"external_id":{"arxiv":["2307.07256"],"isi":["001158043800006"]},"month":"02","scopus_import":"1","oa_version":"Preprint","date_published":"2024-02-01T00:00:00Z","author":[{"first_name":"Volker","orcid":"0000-0002-6963-0129","full_name":"Karle, Volker","id":"D7C012AE-D7ED-11E9-95E8-1EC5E5697425","last_name":"Karle"},{"id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","full_name":"Lemeshko, Mikhail","last_name":"Lemeshko","first_name":"Mikhail","orcid":"0000-0002-6990-7802"}],"project":[{"call_identifier":"H2020","_id":"2688CF98-B435-11E9-9278-68D0E5697425","name":"Angulon: physics and applications of a new quasiparticle","grant_number":"801770"}],"date_updated":"2026-04-07T11:48:53Z"},{"intvolume":"       108","_id":"14553","abstract":[{"lang":"eng","text":"Quantum state tomography is an essential component of modern quantum technology. In application to continuous-variable harmonic-oscillator systems, such as the electromagnetic field, existing tomography methods typically reconstruct the state in discrete bases, and are hence limited to states with relatively low amplitudes and energies. Here, we overcome this limitation by utilizing a feed-forward neural network to obtain the density matrix directly in the continuous position basis. An important benefit of our approach is the ability to choose specific regions in the phase space for detailed reconstruction. This results in a relatively slow scaling of the amount of resources required for the reconstruction with the state amplitude, and hence allows us to dramatically increase the range of amplitudes accessible with our method."}],"status":"public","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2212.07406","open_access":"1"}],"arxiv":1,"publication_status":"published","type":"journal_article","volume":108,"day":"30","issue":"4","publication":"Physical Review A","publisher":"American Physical Society","article_processing_charge":"No","oa":1,"citation":{"apa":"Fedotova, E., Kuznetsov, N., Tiunov, E., Ulanov, A. E., &#38; Lvovsky, A. I. (2023). Continuous-variable quantum tomography of high-amplitude states. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.108.042430\">https://doi.org/10.1103/PhysRevA.108.042430</a>","chicago":"Fedotova, Ekaterina, Nikolai Kuznetsov, Egor Tiunov, A. E. Ulanov, and A. I. Lvovsky. “Continuous-Variable Quantum Tomography of High-Amplitude States.” <i>Physical Review A</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevA.108.042430\">https://doi.org/10.1103/PhysRevA.108.042430</a>.","ama":"Fedotova E, Kuznetsov N, Tiunov E, Ulanov AE, Lvovsky AI. Continuous-variable quantum tomography of high-amplitude states. <i>Physical Review A</i>. 2023;108(4). doi:<a href=\"https://doi.org/10.1103/PhysRevA.108.042430\">10.1103/PhysRevA.108.042430</a>","ista":"Fedotova E, Kuznetsov N, Tiunov E, Ulanov AE, Lvovsky AI. 2023. Continuous-variable quantum tomography of high-amplitude states. Physical Review A. 108(4), 042430.","ieee":"E. Fedotova, N. Kuznetsov, E. Tiunov, A. E. Ulanov, and A. I. Lvovsky, “Continuous-variable quantum tomography of high-amplitude states,” <i>Physical Review A</i>, vol. 108, no. 4. American Physical Society, 2023.","short":"E. Fedotova, N. Kuznetsov, E. Tiunov, A.E. Ulanov, A.I. Lvovsky, Physical Review A 108 (2023).","mla":"Fedotova, Ekaterina, et al. “Continuous-Variable Quantum Tomography of High-Amplitude States.” <i>Physical Review A</i>, vol. 108, no. 4, 042430, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevA.108.042430\">10.1103/PhysRevA.108.042430</a>."},"date_created":"2023-11-19T23:00:54Z","year":"2023","quality_controlled":"1","corr_author":"1","article_type":"original","title":"Continuous-variable quantum tomography of high-amplitude states","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_updated":"2024-10-09T21:07:19Z","date_published":"2023-10-30T00:00:00Z","author":[{"id":"c1bea5e1-878e-11ee-9dff-d7404e4422ab","full_name":"Fedotova, Ekaterina","last_name":"Fedotova","orcid":"0000-0001-7242-015X","first_name":"Ekaterina"},{"first_name":"Nikolai","last_name":"Kuznetsov","full_name":"Kuznetsov, Nikolai"},{"full_name":"Tiunov, Egor","last_name":"Tiunov","first_name":"Egor"},{"last_name":"Ulanov","full_name":"Ulanov, A. E.","first_name":"A. E."},{"first_name":"A. I.","full_name":"Lvovsky, A. I.","last_name":"Lvovsky"}],"month":"10","oa_version":"Preprint","scopus_import":"1","language":[{"iso":"eng"}],"external_id":{"arxiv":["2212.07406"]},"publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.108.042430","department":[{"_id":"JoFi"}],"article_number":"042430"},{"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Overcoming photon blockade in a circuit-QED single-atom maser with engineered metastability and strong coupling","article_type":"letter_note","quality_controlled":"1","year":"2023","date_created":"2023-04-09T22:01:00Z","citation":{"ieee":"A. Sokolova, D. A. Kalacheva, G. P. Fedorov, and O. V. Astafiev, “Overcoming photon blockade in a circuit-QED single-atom maser with engineered metastability and strong coupling,” <i>Physical Review A</i>, vol. 107, no. 3. American Physical Society, 2023.","short":"A. Sokolova, D.A. Kalacheva, G.P. Fedorov, O.V. Astafiev, Physical Review A 107 (2023).","mla":"Sokolova, Alesya, et al. “Overcoming Photon Blockade in a Circuit-QED Single-Atom Maser with Engineered Metastability and Strong Coupling.” <i>Physical Review A</i>, vol. 107, no. 3, L031701, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.L031701\">10.1103/PhysRevA.107.L031701</a>.","apa":"Sokolova, A., Kalacheva, D. A., Fedorov, G. P., &#38; Astafiev, O. V. (2023). Overcoming photon blockade in a circuit-QED single-atom maser with engineered metastability and strong coupling. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.107.L031701\">https://doi.org/10.1103/PhysRevA.107.L031701</a>","chicago":"Sokolova, Alesya, D. A. Kalacheva, G. P. Fedorov, and O. V. Astafiev. “Overcoming Photon Blockade in a Circuit-QED Single-Atom Maser with Engineered Metastability and Strong Coupling.” <i>Physical Review A</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevA.107.L031701\">https://doi.org/10.1103/PhysRevA.107.L031701</a>.","ama":"Sokolova A, Kalacheva DA, Fedorov GP, Astafiev OV. Overcoming photon blockade in a circuit-QED single-atom maser with engineered metastability and strong coupling. <i>Physical Review A</i>. 2023;107(3). doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.L031701\">10.1103/PhysRevA.107.L031701</a>","ista":"Sokolova A, Kalacheva DA, Fedorov GP, Astafiev OV. 2023. Overcoming photon blockade in a circuit-QED single-atom maser with engineered metastability and strong coupling. Physical Review A. 107(3), L031701."},"oa":1,"article_processing_charge":"No","publisher":"American Physical Society","issue":"3","publication":"Physical Review A","day":"22","volume":107,"type":"journal_article","publication_status":"published","arxiv":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2209.05165"}],"status":"public","_id":"12819","intvolume":"       107","abstract":[{"text":"Reaching a high cavity population with a coherent pump in the strong-coupling regime of a single-atom laser is impossible due to the photon blockade effect. In this Letter, we experimentally demonstrate that in a single-atom maser based on a transmon strongly coupled to two resonators, it is possible to pump over a dozen photons into the system. The first high-quality resonator plays the role of a usual lasing cavity, and the second one presents a controlled dissipation channel, bolstering population inversion, and modifies the energy-level structure to lift the blockade. As confirmation of the lasing action, we observe conventional laser features such as a narrowing of the emission linewidth and external signal amplification. Additionally, we report unique single-atom features: self-quenching and several lasing thresholds.","lang":"eng"}],"article_number":"L031701","department":[{"_id":"JoFi"}],"isi":1,"doi":"10.1103/PhysRevA.107.L031701","acknowledgement":"We thank N.N. Abramov for assistance with the experimental setup. The sample was fabricated using equipment of MIPT Shared Facilities Center. This research was supported by Russian Science Foundation, grant no. 21-72-30026.","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"external_id":{"isi":["000957799000006"],"arxiv":["2209.05165"]},"language":[{"iso":"eng"}],"scopus_import":"1","oa_version":"Preprint","month":"03","author":[{"orcid":"0000-0002-8308-4144","first_name":"Alesya","full_name":"Sokolova, Alesya","last_name":"Sokolova","id":"2d0a0600-edfb-11eb-afb5-c0f5fa7f4f3a"},{"first_name":"D. A.","last_name":"Kalacheva","full_name":"Kalacheva, D. A."},{"full_name":"Fedorov, G. P.","last_name":"Fedorov","first_name":"G. P."},{"first_name":"O. V.","full_name":"Astafiev, O. V.","last_name":"Astafiev"}],"date_published":"2023-03-22T00:00:00Z","date_updated":"2023-08-01T14:06:05Z"},{"citation":{"short":"F. Suzuki, W.G. Unruh, Physical Review A 107 (2023).","mla":"Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations for Measuring Tunneling Times.” <i>Physical Review A</i>, vol. 107, no. 4, 042216, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.042216\">10.1103/PhysRevA.107.042216</a>.","ieee":"F. Suzuki and W. G. Unruh, “Numerical quantum clock simulations for measuring tunneling times,” <i>Physical Review A</i>, vol. 107, no. 4. American Physical Society, 2023.","apa":"Suzuki, F., &#38; Unruh, W. G. (2023). Numerical quantum clock simulations for measuring tunneling times. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.107.042216\">https://doi.org/10.1103/PhysRevA.107.042216</a>","chicago":"Suzuki, Fumika, and William G. Unruh. “Numerical Quantum Clock Simulations for Measuring Tunneling Times.” <i>Physical Review A</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevA.107.042216\">https://doi.org/10.1103/PhysRevA.107.042216</a>.","ama":"Suzuki F, Unruh WG. Numerical quantum clock simulations for measuring tunneling times. <i>Physical Review A</i>. 2023;107(4). doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.042216\">10.1103/PhysRevA.107.042216</a>","ista":"Suzuki F, Unruh WG. 2023. Numerical quantum clock simulations for measuring tunneling times. Physical Review A. 107(4), 042216."},"oa":1,"article_type":"original","quality_controlled":"1","corr_author":"1","year":"2023","date_created":"2023-05-07T22:01:03Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Numerical quantum clock simulations for measuring tunneling times","ec_funded":1,"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2207.13130"}],"status":"public","_id":"12914","abstract":[{"text":"We numerically study two methods of measuring tunneling times using a quantum clock. In the conventional method using the Larmor clock, we show that the Larmor tunneling time can be shorter for higher tunneling barriers. In the second method, we study the probability of a spin-flip of a particle when it is transmitted through a potential barrier including a spatially rotating field interacting with its spin. According to the adiabatic theorem, the probability depends on the velocity of the particle inside the barrier. It is numerically observed that the probability increases for higher barriers, which is consistent with the result obtained by the Larmor clock. By comparing outcomes for different initial spin states, we suggest that one of the main causes of the apparent decrease in the tunneling time can be the filtering effect occurring at the end of the barrier.","lang":"eng"}],"intvolume":"       107","publication_status":"published","arxiv":1,"day":"20","volume":107,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","issue":"4","publication":"Physical Review A","acknowledgement":"We thank W. H. Zurek, N. Sinitsyn, M. O. Scully, M. Arndt, and C. H. Marrows for helpful discussions. F.S. acknowledges support from the Los Alamos National Laboratory LDRD program under Project No. 20230049DR and the Center for Nonlinear Studies. F.S. also thanks the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant No. 754411 for support. W.G.U. thanks the Natural Science and Engineering Research Council of Canada, the Hagler Institute of Texas A&M University, the Helmholz Inst HZDR, Germany for support while this work was being done.","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.107.042216","department":[{"_id":"MiLe"}],"isi":1,"article_number":"042216","date_updated":"2025-04-14T07:44:01Z","project":[{"grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships"}],"author":[{"first_name":"Fumika","orcid":"0000-0003-4982-5970","last_name":"Suzuki","full_name":"Suzuki, Fumika","id":"650C99FC-1079-11EA-A3C0-73AE3DDC885E"},{"first_name":"William G.","full_name":"Unruh, William G.","last_name":"Unruh"}],"date_published":"2023-04-20T00:00:00Z","oa_version":"Preprint","scopus_import":"1","month":"04","external_id":{"isi":["000975799300006"],"arxiv":["2207.13130"]},"language":[{"iso":"eng"}]},{"isi":1,"department":[{"_id":"MiLe"},{"_id":"OnHo"}],"article_number":"L061304","acknowledgement":"We thank Jan Arlt, Hans-Werner Hammer, and Karsten Riisager for useful discussions. M.L. acknowledges support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON).","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.107.L061304","scopus_import":"1","oa_version":"Preprint","month":"06","external_id":{"arxiv":["2302.01022"],"isi":["001019748000005"]},"language":[{"iso":"eng"}],"date_updated":"2025-04-14T07:48:53Z","project":[{"grant_number":"801770","name":"Angulon: physics and applications of a new quasiparticle","call_identifier":"H2020","_id":"2688CF98-B435-11E9-9278-68D0E5697425"}],"author":[{"id":"09501ff6-dca7-11ea-a8ae-b3e0b9166e80","full_name":"Agafonova, Sofya","last_name":"Agafonova","first_name":"Sofya","orcid":"0000-0003-0582-2946"},{"id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","last_name":"Lemeshko","full_name":"Lemeshko, Mikhail","orcid":"0000-0002-6990-7802","first_name":"Mikhail"},{"first_name":"Artem","orcid":"0000-0003-0393-5525","full_name":"Volosniev, Artem","last_name":"Volosniev","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"}],"date_published":"2023-06-20T00:00:00Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Finite-range bias in fitting three-body loss to the zero-range model","ec_funded":1,"citation":{"ama":"Agafonova S, Lemeshko M, Volosniev A. Finite-range bias in fitting three-body loss to the zero-range model. <i>Physical Review A</i>. 2023;107(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.L061304\">10.1103/PhysRevA.107.L061304</a>","ista":"Agafonova S, Lemeshko M, Volosniev A. 2023. Finite-range bias in fitting three-body loss to the zero-range model. Physical Review A. 107(6), L061304.","apa":"Agafonova, S., Lemeshko, M., &#38; Volosniev, A. (2023). Finite-range bias in fitting three-body loss to the zero-range model. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.107.L061304\">https://doi.org/10.1103/PhysRevA.107.L061304</a>","chicago":"Agafonova, Sofya, Mikhail Lemeshko, and Artem Volosniev. “Finite-Range Bias in Fitting Three-Body Loss to the Zero-Range Model.” <i>Physical Review A</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevA.107.L061304\">https://doi.org/10.1103/PhysRevA.107.L061304</a>.","ieee":"S. Agafonova, M. Lemeshko, and A. Volosniev, “Finite-range bias in fitting three-body loss to the zero-range model,” <i>Physical Review A</i>, vol. 107, no. 6. American Physical Society, 2023.","short":"S. Agafonova, M. Lemeshko, A. Volosniev, Physical Review A 107 (2023).","mla":"Agafonova, Sofya, et al. “Finite-Range Bias in Fitting Three-Body Loss to the Zero-Range Model.” <i>Physical Review A</i>, vol. 107, no. 6, L061304, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevA.107.L061304\">10.1103/PhysRevA.107.L061304</a>."},"oa":1,"corr_author":"1","quality_controlled":"1","article_type":"letter_note","date_created":"2023-07-16T22:01:10Z","year":"2023","volume":107,"day":"20","type":"journal_article","article_processing_charge":"No","issue":"6","publication":"Physical Review A","publisher":"American Physical Society","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2302.01022","open_access":"1"}],"_id":"13233","abstract":[{"lang":"eng","text":"We study the impact of finite-range physics on the zero-range-model analysis of three-body recombination in ultracold atoms. We find that temperature dependence of the zero-range parameters can vary from one set of measurements to another as it may be driven by the distribution of error bars in the experiment, and not by the underlying three-body physics. To study finite-temperature effects in three-body recombination beyond the zero-range physics, we introduce and examine a finite-range model based upon a hyperspherical formalism. The systematic error discussed in this Letter may provide a significant contribution to the error bars of measured three-body parameters."}],"intvolume":"       107","status":"public","publication_status":"published","arxiv":1},{"related_material":{"record":[{"status":"public","id":"17208","relation":"dissertation_contains"},{"relation":"dissertation_contains","id":"14622","status":"public"}]},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","file_date_updated":"2023-06-13T07:28:36Z","title":"Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement","ec_funded":1,"quality_controlled":"1","corr_author":"1","article_type":"original","date_created":"2023-06-07T06:57:32Z","year":"2023","citation":{"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.","ama":"Sack S, Medina Ramos RA, Kueng R, Serbyn M. Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement. <i>Physical Review A</i>. 2023;107(6). doi:<a href=\"https://doi.org/10.1103/physreva.107.062404\">10.1103/physreva.107.062404</a>","chicago":"Sack, Stefan, Raimel A Medina Ramos, Richard Kueng, and Maksym Serbyn. “Recursive Greedy Initialization of the Quantum Approximate Optimization Algorithm with Guaranteed Improvement.” <i>Physical Review A</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physreva.107.062404\">https://doi.org/10.1103/physreva.107.062404</a>.","apa":"Sack, S., Medina Ramos, R. A., Kueng, R., &#38; Serbyn, M. (2023). Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physreva.107.062404\">https://doi.org/10.1103/physreva.107.062404</a>","short":"S. Sack, R.A. Medina Ramos, R. Kueng, M. Serbyn, Physical Review A 107 (2023).","ieee":"S. Sack, R. A. Medina Ramos, R. Kueng, and M. Serbyn, “Recursive greedy initialization of the quantum approximate optimization algorithm with guaranteed improvement,” <i>Physical Review A</i>, vol. 107, no. 6. American Physical Society, 2023.","mla":"Sack, Stefan, et al. “Recursive Greedy Initialization of the Quantum Approximate Optimization Algorithm with Guaranteed Improvement.” <i>Physical Review A</i>, vol. 107, no. 6, 062404, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physreva.107.062404\">10.1103/physreva.107.062404</a>."},"oa":1,"article_processing_charge":"No","issue":"6","publication":"Physical Review A","publisher":"American Physical Society","volume":107,"day":"02","type":"journal_article","publication_status":"published","file":[{"checksum":"0d71423888eeccaa60d8f41197f26306","file_size":2524611,"access_level":"open_access","file_id":"13131","file_name":"2023_PhysRevA_Sack.pdf","date_created":"2023-06-13T07:28:36Z","content_type":"application/pdf","relation":"main_file","date_updated":"2023-06-13T07:28:36Z","success":1,"creator":"dernst"}],"arxiv":1,"abstract":[{"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. ","lang":"eng"}],"_id":"13125","intvolume":"       107","status":"public","article_number":"062404","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"department":[{"_id":"MaSe"}],"isi":1,"doi":"10.1103/physreva.107.062404","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). ","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"external_id":{"isi":["001016927100012"],"arxiv":["2209.01159"]},"language":[{"iso":"eng"}],"scopus_import":"1","oa_version":"Published Version","has_accepted_license":"1","month":"06","author":[{"first_name":"Stefan","orcid":"0000-0001-5400-8508","full_name":"Sack, Stefan","last_name":"Sack","id":"dd622248-f6e0-11ea-865d-ce382a1c81a5"},{"first_name":"Raimel A","orcid":"0000-0002-5383-2869","full_name":"Medina Ramos, Raimel A","last_name":"Medina Ramos","id":"CE680B90-D85A-11E9-B684-C920E6697425"},{"first_name":"Richard","last_name":"Kueng","full_name":"Kueng, Richard"},{"orcid":"0000-0002-2399-5827","first_name":"Maksym","full_name":"Serbyn, Maksym","id":"47809E7E-F248-11E8-B48F-1D18A9856A87","last_name":"Serbyn"}],"date_published":"2023-06-02T00:00:00Z","ddc":["530"],"date_updated":"2026-04-26T22:30:24Z","project":[{"_id":"23841C26-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","name":"Non-Ergodic Quantum Matter: Universality, Dynamics and Control","grant_number":"850899"}]},{"project":[{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","call_identifier":"H2020","name":"Quantum Local Area Networks with Superconducting Qubits","grant_number":"899354"}],"date_updated":"2025-04-14T07:53:28Z","author":[{"first_name":"J.","last_name":"Agustí","full_name":"Agustí, J."},{"last_name":"Minoguchi","full_name":"Minoguchi, Y.","first_name":"Y."},{"last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","orcid":"0000-0001-8112-028X"},{"first_name":"P.","last_name":"Rabl","full_name":"Rabl, P."}],"date_published":"2022-06-29T00:00:00Z","scopus_import":"1","oa_version":"Preprint","month":"06","external_id":{"isi":["000824330200003"],"arxiv":["2204.02993"]},"language":[{"iso":"eng"}],"acknowledgement":"We thank T. Mavrogordatos and D. Zhu for initial contribution on the presented topic and K. Fedorov for stimulating discussions on entangled microwave beams. This work was supported by the Austrian Science Fund (FWF) through Grant No. P32299 (PHONED) and the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 899354 (SuperQuLAN). Most of the computational results presented were obtained using the CLIP cluster [65].","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"doi":"10.1103/PhysRevA.105.062454","isi":1,"department":[{"_id":"JoFi"}],"article_number":"062454","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2204.02993","open_access":"1"}],"status":"public","_id":"11591","intvolume":"       105","abstract":[{"lang":"eng","text":"We investigate the deterministic generation and distribution of entanglement in large quantum networks by driving distant qubits with the output fields of a nondegenerate parametric amplifier. In this setting, the amplifier produces a continuous Gaussian two-mode squeezed state, which acts as a quantum-correlated reservoir for the qubits and relaxes them into a highly entangled steady state. Here we are interested in the maximal amount of entanglement and the optimal entanglement generation rates that can be achieved with this scheme under realistic conditions taking, in particular, the finite amplifier bandwidth, waveguide losses, and propagation delays into account. By combining exact numerical simulations of the full network with approximate analytic results, we predict the optimal working point for the amplifier and the corresponding qubit-qubit entanglement under various conditions. Our findings show that this passive conversion of Gaussian into discrete-variable entanglement offers a robust and experimentally very attractive approach for operating large optical, microwave, or hybrid quantum networks, for which efficient parametric amplifiers are currently developed."}],"publication_status":"published","arxiv":1,"day":"29","volume":105,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","publication":"Physical Review A","issue":"6","citation":{"ieee":"J. Agustí, Y. Minoguchi, J. M. Fink, and P. Rabl, “Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams,” <i>Physical Review A</i>, vol. 105, no. 6. American Physical Society, 2022.","short":"J. Agustí, Y. Minoguchi, J.M. Fink, P. Rabl, Physical Review A 105 (2022).","mla":"Agustí, J., et al. “Long-Distance Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.” <i>Physical Review A</i>, vol. 105, no. 6, 062454, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">10.1103/PhysRevA.105.062454</a>.","chicago":"Agustí, J., Y. Minoguchi, Johannes M Fink, and P. Rabl. “Long-Distance Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">https://doi.org/10.1103/PhysRevA.105.062454</a>.","apa":"Agustí, J., Minoguchi, Y., Fink, J. M., &#38; Rabl, P. (2022). Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">https://doi.org/10.1103/PhysRevA.105.062454</a>","ista":"Agustí J, Minoguchi Y, Fink JM, Rabl P. 2022. Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. Physical Review A. 105(6), 062454.","ama":"Agustí J, Minoguchi Y, Fink JM, Rabl P. Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. <i>Physical Review A</i>. 2022;105(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">10.1103/PhysRevA.105.062454</a>"},"oa":1,"article_type":"original","quality_controlled":"1","year":"2022","date_created":"2022-07-17T22:01:55Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams","ec_funded":1},{"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations","citation":{"short":"G. Bighin, A. Cappellaro, L. Salasnich, Physical Review A 105 (2022).","mla":"Bighin, Giacomo, et al. “Unitary Fermi Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from Elementary Excitations.” <i>Physical Review A</i>, vol. 105, no. 6, 063329, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">10.1103/PhysRevA.105.063329</a>.","ieee":"G. Bighin, A. Cappellaro, and L. Salasnich, “Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations,” <i>Physical Review A</i>, vol. 105, no. 6. American Physical Society, 2022.","ista":"Bighin G, Cappellaro A, Salasnich L. 2022. Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. Physical Review A. 105(6), 063329.","ama":"Bighin G, Cappellaro A, Salasnich L. Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. <i>Physical Review A</i>. 2022;105(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">10.1103/PhysRevA.105.063329</a>","chicago":"Bighin, Giacomo, Alberto Cappellaro, and L. Salasnich. “Unitary Fermi Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from Elementary Excitations.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">https://doi.org/10.1103/PhysRevA.105.063329</a>.","apa":"Bighin, G., Cappellaro, A., &#38; Salasnich, L. (2022). Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">https://doi.org/10.1103/PhysRevA.105.063329</a>"},"oa":1,"article_type":"original","quality_controlled":"1","year":"2022","date_created":"2022-07-17T22:01:55Z","day":"30","volume":105,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","issue":"6","publication":"Physical Review A","main_file_link":[{"open_access":"1","url":" https://doi.org/10.48550/arXiv.2206.03924"}],"status":"public","_id":"11592","intvolume":"       105","abstract":[{"text":"We compare recent experimental results [Science 375, 528 (2022)] of the superfluid unitary Fermi gas near the critical temperature with a thermodynamic model based on the elementary excitations of the system. We find good agreement between experimental data and our theory for several quantities such as first sound, second sound, and superfluid fraction. We also show that mode mixing between first and second sound occurs. Finally, we characterize the response amplitude to a density perturbation: Close to the critical temperature both first and second sound can be excited through a density perturbation, whereas at lower temperatures only the first sound mode exhibits a significant response.","lang":"eng"}],"publication_status":"published","arxiv":1,"department":[{"_id":"MiLe"}],"isi":1,"article_number":"063329","acknowledgement":"The authors gratefully acknowledge stimulating discussions with T. Enss, and thank an anonymous referee for suggestions and remarks that allowed us to improve the original manuscript. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster).","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.105.063329","scopus_import":"1","oa_version":"Preprint","month":"06","external_id":{"arxiv":["2206.03924"],"isi":["000829758500010"]},"language":[{"iso":"eng"}],"date_updated":"2023-08-03T12:00:11Z","author":[{"full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","last_name":"Bighin","orcid":"0000-0001-8823-9777","first_name":"Giacomo"},{"orcid":"0000-0001-6110-2359","first_name":"Alberto","last_name":"Cappellaro","id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","full_name":"Cappellaro, Alberto"},{"first_name":"L.","last_name":"Salasnich","full_name":"Salasnich, L."}],"date_published":"2022-06-30T00:00:00Z"},{"scopus_import":"1","oa_version":"Preprint","month":"08","external_id":{"arxiv":["2109.07451"],"isi":["000837953600006"]},"language":[{"iso":"eng"}],"project":[{"grant_number":"M02641","call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425","name":"A path-integral approach to composite impurities"}],"date_updated":"2025-04-14T08:57:11Z","author":[{"first_name":"Giacomo","orcid":"0000-0001-8823-9777","full_name":"Bighin, Giacomo","last_name":"Bighin","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Burchianti","full_name":"Burchianti, A.","first_name":"A."},{"last_name":"Minardi","full_name":"Minardi, F.","first_name":"F."},{"full_name":"Macrì, T.","last_name":"Macrì","first_name":"T."}],"date_published":"2022-08-04T00:00:00Z","isi":1,"department":[{"_id":"MiLe"}],"article_number":"023301","acknowledgement":"We thank A. Simoni for providing the calculations of the intercomponent scattering lengths. We gratefully acknowledge stimulating discussions with L. A. Peña Ardila, R. Schmidt, H. Silva, V. Zampronio, and M. Prevedelli for careful reading. G.B. acknowledges support from the Austrian Science Fund (FWF) under Project No. M2641-N27. T.M. acknowledges CNPq for support through Bolsa de produtividade em Pesquisa No. 311079/2015-6. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy No. EXC2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster). This work was supported by the Serrapilheira Institute (Grant No. Serra-1812-27802). We thank the High-Performance Computing Center (NPAD) at UFRN for providing computational resources.","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"doi":"10.1103/PhysRevA.106.023301","day":"04","volume":106,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","publication":"Physical Review A","issue":"2","main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2109.07451"}],"status":"public","intvolume":"       106","_id":"11997","abstract":[{"lang":"eng","text":"We study the fate of an impurity in an ultracold heteronuclear Bose mixture, focusing on the experimentally relevant case of a ⁴¹K - ⁸⁷Rb mixture, with the impurity in a ⁴¹K hyperfine state. Our paper provides a comprehensive description of an impurity in a BEC mixture with contact interactions across its phase diagram. We present results for the miscible and immiscible regimes, as well as for the impurity in a self-bound quantum droplet. Here, varying the interactions, we find exotic states where the impurity localizes either at the center or\r\nat the surface of the droplet. "}],"publication_status":"published","arxiv":1,"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Impurity in a heteronuclear two-component Bose mixture","citation":{"ieee":"G. Bighin, A. Burchianti, F. Minardi, and T. Macrì, “Impurity in a heteronuclear two-component Bose mixture,” <i>Physical Review A</i>, vol. 106, no. 2. American Physical Society, 2022.","mla":"Bighin, Giacomo, et al. “Impurity in a Heteronuclear Two-Component Bose Mixture.” <i>Physical Review A</i>, vol. 106, no. 2, 023301, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevA.106.023301\">10.1103/PhysRevA.106.023301</a>.","short":"G. Bighin, A. Burchianti, F. Minardi, T. Macrì, Physical Review A 106 (2022).","ista":"Bighin G, Burchianti A, Minardi F, Macrì T. 2022. Impurity in a heteronuclear two-component Bose mixture. Physical Review A. 106(2), 023301.","ama":"Bighin G, Burchianti A, Minardi F, Macrì T. Impurity in a heteronuclear two-component Bose mixture. <i>Physical Review A</i>. 2022;106(2). doi:<a href=\"https://doi.org/10.1103/PhysRevA.106.023301\">10.1103/PhysRevA.106.023301</a>","chicago":"Bighin, Giacomo, A. Burchianti, F. Minardi, and T. Macrì. “Impurity in a Heteronuclear Two-Component Bose Mixture.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevA.106.023301\">https://doi.org/10.1103/PhysRevA.106.023301</a>.","apa":"Bighin, G., Burchianti, A., Minardi, F., &#38; Macrì, T. (2022). Impurity in a heteronuclear two-component Bose mixture. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.106.023301\">https://doi.org/10.1103/PhysRevA.106.023301</a>"},"oa":1,"article_type":"original","quality_controlled":"1","year":"2022","date_created":"2022-08-28T22:02:00Z"},{"type":"journal_article","day":"01","volume":105,"publisher":"American Physical Society","publication":"Physical Review A","issue":"2","extern":"1","article_processing_charge":"No","status":"public","abstract":[{"text":"Large-scale quantum devices provide insights beyond the reach of classical simulations. However, for a reliable and verifiable quantum simulation, the building blocks of the quantum device require exquisite benchmarking. This benchmarking of large-scale dynamical quantum systems represents a major challenge due to lack of efficient tools for their simulation. Here, we present a scalable algorithm based on neural networks for Hamiltonian tomography in out-of-equilibrium quantum systems. We illustrate our approach using a model for a forefront quantum simulation platform: ultracold atoms in optical lattices. Specifically, we show that our algorithm is able to reconstruct the Hamiltonian of an arbitrary sized bosonic ladder system using an accessible amount of experimental measurements. We are able to significantly increase the previously known parameter precision.","lang":"eng"}],"_id":"18191","intvolume":"       105","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2103.01240","open_access":"1"}],"arxiv":1,"publication_status":"published","title":"Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"citation":{"ista":"Valenti A, Jin G, Leonard J, Huber SD, Greplova E. 2022. Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics. Physical Review A. 105(2), 023302.","ama":"Valenti A, Jin G, Leonard J, Huber SD, Greplova E. Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics. <i>Physical Review A</i>. 2022;105(2). doi:<a href=\"https://doi.org/10.1103/physreva.105.023302\">10.1103/physreva.105.023302</a>","chicago":"Valenti, Agnes, Guliuxin Jin, Julian Leonard, Sebastian D. Huber, and Eliska Greplova. “Scalable Hamiltonian Learning for Large-Scale out-of-Equilibrium Quantum Dynamics.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/physreva.105.023302\">https://doi.org/10.1103/physreva.105.023302</a>.","apa":"Valenti, A., Jin, G., Leonard, J., Huber, S. D., &#38; Greplova, E. (2022). Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physreva.105.023302\">https://doi.org/10.1103/physreva.105.023302</a>","short":"A. Valenti, G. Jin, J. Leonard, S.D. Huber, E. Greplova, Physical Review A 105 (2022).","mla":"Valenti, Agnes, et al. “Scalable Hamiltonian Learning for Large-Scale out-of-Equilibrium Quantum Dynamics.” <i>Physical Review A</i>, vol. 105, no. 2, 023302, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/physreva.105.023302\">10.1103/physreva.105.023302</a>.","ieee":"A. Valenti, G. Jin, J. Leonard, S. D. Huber, and E. Greplova, “Scalable Hamiltonian learning for large-scale out-of-equilibrium quantum dynamics,” <i>Physical Review A</i>, vol. 105, no. 2. American Physical Society, 2022."},"year":"2022","date_created":"2024-10-07T11:46:53Z","article_type":"original","quality_controlled":"1","month":"02","oa_version":"Preprint","scopus_import":"1","language":[{"iso":"eng"}],"external_id":{"arxiv":["2103.01240"]},"date_updated":"2024-10-08T10:00:23Z","date_published":"2022-02-01T00:00:00Z","author":[{"first_name":"Agnes","full_name":"Valenti, Agnes","last_name":"Valenti"},{"full_name":"Jin, Guliuxin","last_name":"Jin","first_name":"Guliuxin"},{"first_name":"Julian","id":"b75b3f45-7995-11ef-9bfd-9a9cd02c3577","last_name":"Leonard","full_name":"Leonard, Julian"},{"first_name":"Sebastian D.","last_name":"Huber","full_name":"Huber, Sebastian D."},{"first_name":"Eliska","full_name":"Greplova, Eliska","last_name":"Greplova"}],"article_number":"023302","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"doi":"10.1103/physreva.105.023302"},{"date_updated":"2024-10-14T12:26:26Z","author":[{"first_name":"Denitsa Rangelova","id":"71b4d059-2a03-11ee-914d-dfa3beed6530","last_name":"Baykusheva","full_name":"Baykusheva, Denitsa Rangelova"},{"last_name":"Chacón","full_name":"Chacón, Alexis","first_name":"Alexis"},{"full_name":"Kim, Dasol","last_name":"Kim","first_name":"Dasol"},{"first_name":"Dong Eon","last_name":"Kim","full_name":"Kim, Dong Eon"},{"last_name":"Reis","full_name":"Reis, David A.","first_name":"David A."},{"last_name":"Ghimire","full_name":"Ghimire, Shambhu","first_name":"Shambhu"}],"date_published":"2021-02-01T00:00:00Z","scopus_import":"1","oa_version":"Preprint","month":"02","external_id":{"arxiv":["2008.01265"]},"language":[{"iso":"eng"}],"publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"doi":"10.1103/physreva.103.023101","article_number":"023101","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2008.01265"}],"status":"public","abstract":[{"lang":"eng","text":"We investigate theoretically the strong-field regime of light-matter interactions in the topological-insulator class of quantum materials. In particular, we focus on the process of nonperturbative high-order harmonic generation from the paradigmatic three-dimensional topological insulator bismuth selenide (Bi2Se3) subjected to intense midinfrared laser fields. We analyze the contributions from the spin-orbit-coupled bulk states and the topological surface bands separately and reveal a major difference in how their harmonic yields depend on the ellipticity of the laser field. Bulk harmonics show a monotonic decrease in their yield as the ellipticity increases, in a manner reminiscent of high harmonic generation in gaseous media. However, the surface contribution exhibits a highly nontrivial dependence, culminating with a maximum for circularly polarized fields. We attribute the observed anomalous behavior to (i) the enhanced amplitude and the circular pattern of the interband dipole and the Berry connections in the vicinity of the Dirac point and (ii) the influence of the higher-order, hexagonal warping terms in the Hamiltonian, which are responsible for the hexagonal deformation of the energy surface at higher momenta. The latter are associated directly with spin-orbit-coupling parameters. Our results thus establish the sensitivity of strong-field-driven high harmonic emission to the topology of the band structure as well as to the manifestations of spin-orbit interaction."}],"_id":"13997","intvolume":"       103","publication_status":"published","arxiv":1,"day":"01","volume":103,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","issue":"2","publication":"Physical Review A","extern":"1","citation":{"ieee":"D. R. Baykusheva, A. Chacón, D. Kim, D. E. Kim, D. A. Reis, and S. Ghimire, “Strong-field physics in three-dimensional topological insulators,” <i>Physical Review A</i>, vol. 103, no. 2. American Physical Society, 2021.","mla":"Baykusheva, Denitsa Rangelova, et al. “Strong-Field Physics in Three-Dimensional Topological Insulators.” <i>Physical Review A</i>, vol. 103, no. 2, 023101, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/physreva.103.023101\">10.1103/physreva.103.023101</a>.","short":"D.R. Baykusheva, A. Chacón, D. Kim, D.E. Kim, D.A. Reis, S. Ghimire, Physical Review A 103 (2021).","ama":"Baykusheva DR, Chacón A, Kim D, Kim DE, Reis DA, Ghimire S. Strong-field physics in three-dimensional topological insulators. <i>Physical Review A</i>. 2021;103(2). doi:<a href=\"https://doi.org/10.1103/physreva.103.023101\">10.1103/physreva.103.023101</a>","ista":"Baykusheva DR, Chacón A, Kim D, Kim DE, Reis DA, Ghimire S. 2021. Strong-field physics in three-dimensional topological insulators. Physical Review A. 103(2), 023101.","apa":"Baykusheva, D. R., Chacón, A., Kim, D., Kim, D. E., Reis, D. A., &#38; Ghimire, S. (2021). Strong-field physics in three-dimensional topological insulators. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physreva.103.023101\">https://doi.org/10.1103/physreva.103.023101</a>","chicago":"Baykusheva, Denitsa Rangelova, Alexis Chacón, Dasol Kim, Dong Eon Kim, David A. Reis, and Shambhu Ghimire. “Strong-Field Physics in Three-Dimensional Topological Insulators.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/physreva.103.023101\">https://doi.org/10.1103/physreva.103.023101</a>."},"oa":1,"article_type":"original","quality_controlled":"1","year":"2021","date_created":"2023-08-09T13:09:26Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","title":"Strong-field physics in three-dimensional topological insulators"},{"main_file_link":[{"open_access":"1","url":"http://128.84.4.18/abs/2107.00468"}],"status":"public","_id":"10631","intvolume":"       104","abstract":[{"text":"We combine experimental and theoretical approaches to explore excited rotational states of molecules embedded in helium nanodroplets using CS2 and I2 as examples. Laser-induced nonadiabatic molecular alignment is employed to measure spectral lines for rotational states extending beyond those initially populated at the 0.37 K droplet temperature. We construct a simple quantum-mechanical model, based on a linear rotor coupled to a single-mode bosonic bath, to determine the rotational energy structure in its entirety. The calculated and measured spectral lines are in good agreement. We show that the effect of the surrounding superfluid on molecular rotation can be rationalized by a single quantity, the angular momentum, transferred from the molecule to the droplet.","lang":"eng"}],"publication_status":"published","arxiv":1,"day":"30","volume":104,"type":"journal_article","article_processing_charge":"No","publisher":"American Physical Society","issue":"6","publication":"Physical Review A","citation":{"apa":"Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Albrechtsen, S. H., Muñoz, A. V., … Lemeshko, M. (2021). Excited rotational states of molecules in a superfluid. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">https://doi.org/10.1103/PhysRevA.104.L061303</a>","chicago":"Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Simon H. Albrechtsen, Alberto Viñas Muñoz, Lars Christiansen, Henrik Stapelfeldt, and Mikhail Lemeshko. “Excited Rotational States of Molecules in a Superfluid.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">https://doi.org/10.1103/PhysRevA.104.L061303</a>.","ama":"Cherepanov I, Bighin G, Schouder CA, et al. Excited rotational states of molecules in a superfluid. <i>Physical Review A</i>. 2021;104(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">10.1103/PhysRevA.104.L061303</a>","ista":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Albrechtsen SH, Muñoz AV, Christiansen L, Stapelfeldt H, Lemeshko M. 2021. Excited rotational states of molecules in a superfluid. Physical Review A. 104(6), L061303.","mla":"Cherepanov, Igor, et al. “Excited Rotational States of Molecules in a Superfluid.” <i>Physical Review A</i>, vol. 104, no. 6, L061303, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/PhysRevA.104.L061303\">10.1103/PhysRevA.104.L061303</a>.","ieee":"I. Cherepanov <i>et al.</i>, “Excited rotational states of molecules in a superfluid,” <i>Physical Review A</i>, vol. 104, no. 6. American Physical Society, 2021.","short":"I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, S.H. Albrechtsen, A.V. Muñoz, L. Christiansen, H. Stapelfeldt, M. Lemeshko, Physical Review A 104 (2021)."},"oa":1,"article_type":"original","quality_controlled":"1","corr_author":"1","year":"2021","date_created":"2022-01-16T23:01:29Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","title":"Excited rotational states of molecules in a superfluid","ec_funded":1,"project":[{"grant_number":"P29902","_id":"26031614-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Quantum rotations in the presence of a many-body environment"},{"name":"Angulon: physics and applications of a new quasiparticle","_id":"2688CF98-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"801770"},{"grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"International IST Doctoral Program"},{"grant_number":"M02641","name":"A path-integral approach to composite impurities","call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425"}],"date_updated":"2025-03-31T16:00:55Z","author":[{"first_name":"Igor","full_name":"Cherepanov, Igor","last_name":"Cherepanov","id":"339C7E5A-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Giacomo","orcid":"0000-0001-8823-9777","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","last_name":"Bighin"},{"full_name":"Schouder, Constant A.","last_name":"Schouder","first_name":"Constant A."},{"full_name":"Chatterley, Adam S.","last_name":"Chatterley","first_name":"Adam S."},{"last_name":"Albrechtsen","full_name":"Albrechtsen, Simon H.","first_name":"Simon H."},{"full_name":"Muñoz, Alberto Viñas","last_name":"Muñoz","first_name":"Alberto Viñas"},{"full_name":"Christiansen, Lars","last_name":"Christiansen","first_name":"Lars"},{"first_name":"Henrik","last_name":"Stapelfeldt","full_name":"Stapelfeldt, Henrik"},{"orcid":"0000-0002-6990-7802","first_name":"Mikhail","last_name":"Lemeshko","full_name":"Lemeshko, Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87"}],"date_published":"2021-12-30T00:00:00Z","scopus_import":"1","oa_version":"Preprint","month":"12","external_id":{"arxiv":["2107.00468"],"isi":["000739618300001"]},"language":[{"iso":"eng"}],"acknowledgement":"I.C. acknowledges the support by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 665385. G.B. acknowledges support from the Austrian Science Fund (FWF), under project No. M2461-N27. M.L. acknowledges support by the Austrian Science Fund (FWF), under project No. P29902-N27, and by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). H.S acknowledges support from the European Research Council-AdG (Project No. 320459, DropletControl) and from The Villum Foundation through a Villum Investigator grant no. 25886.","publication_identifier":{"eissn":["2469-9934"],"issn":["2469-9926"]},"doi":"10.1103/PhysRevA.104.L061303","department":[{"_id":"MiLe"}],"isi":1,"article_number":"L061303"},{"title":"Frequency-multiplexed hybrid optical entangled source based on the Pockels effect","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","date_created":"2021-03-14T23:01:33Z","year":"2021","quality_controlled":"1","article_type":"original","oa":1,"citation":{"mla":"Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled Source Based on the Pockels Effect.” <i>Physical Review A</i>, vol. 103, no. 2, 023708, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.023708\">10.1103/PhysRevA.103.023708</a>.","short":"A.R. Rueda Sanchez, Physical Review A 103 (2021).","ieee":"A. R. Rueda Sanchez, “Frequency-multiplexed hybrid optical entangled source based on the Pockels effect,” <i>Physical Review A</i>, vol. 103, no. 2. American Physical Society, 2021.","apa":"Rueda Sanchez, A. R. (2021). Frequency-multiplexed hybrid optical entangled source based on the Pockels effect. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.103.023708\">https://doi.org/10.1103/PhysRevA.103.023708</a>","chicago":"Rueda Sanchez, Alfredo R. “Frequency-Multiplexed Hybrid Optical Entangled Source Based on the Pockels Effect.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PhysRevA.103.023708\">https://doi.org/10.1103/PhysRevA.103.023708</a>.","ama":"Rueda Sanchez AR. Frequency-multiplexed hybrid optical entangled source based on the Pockels effect. <i>Physical Review A</i>. 2021;103(2). doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.023708\">10.1103/PhysRevA.103.023708</a>","ista":"Rueda Sanchez AR. 2021. Frequency-multiplexed hybrid optical entangled source based on the Pockels effect. Physical Review A. 103(2), 023708."},"publication":"Physical Review A","issue":"2","publisher":"American Physical Society","article_processing_charge":"No","type":"journal_article","volume":103,"day":"11","arxiv":1,"publication_status":"published","_id":"9242","abstract":[{"text":"In the recent years important experimental advances in resonant electro-optic modulators as high-efficiency sources for coherent frequency combs and as devices for quantum information transfer have been realized, where strong optical and microwave mode coupling were achieved. These features suggest electro-optic-based devices as candidates for entangled optical frequency comb sources. In the present work, I study the generation of entangled optical frequency combs in millimeter-sized resonant electro-optic modulators. These devices profit from the experimentally proven advantages such as nearly constant optical free spectral ranges over several gigahertz, and high optical and microwave quality factors. The generation of frequency multiplexed quantum channels with spectral bandwidth in the MHz range for conservative parameter values paves the way towards novel uses in long-distance hybrid quantum networks, quantum key distribution, enhanced optical metrology, and quantum computing.","lang":"eng"}],"intvolume":"       103","status":"public","main_file_link":[{"url":"https://arxiv.org/abs/2010.05356","open_access":"1"}],"article_number":"023708","department":[{"_id":"JoFi"}],"isi":1,"doi":"10.1103/PhysRevA.103.023708","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"acknowledgement":"I thank Prof. Shabir Barzanjeh and Dr. Ulrich Vogl for the fruitful discussions.\r\n","language":[{"iso":"eng"}],"external_id":{"arxiv":["2010.05356"],"isi":["000617037900013"]},"month":"02","scopus_import":"1","oa_version":"Preprint","date_published":"2021-02-11T00:00:00Z","author":[{"first_name":"Alfredo R","orcid":"0000-0001-6249-5860","last_name":"Rueda Sanchez","full_name":"Rueda Sanchez, Alfredo R","id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87"}],"date_updated":"2023-08-07T14:11:18Z"},{"department":[{"_id":"MiLe"}],"isi":1,"article_number":"L061303","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"acknowledgement":"G.B. acknowledges support from the Austrian Science Fund (FWF), under Project No. M2641-N27. This work was\r\npartially supported by the University of Padua, BIRD project “Superfluid properties of Fermi gases in optical potentials.”\r\nThe authors thank Miki Ota, Tomoki Ozawa, Sandro Stringari, Tilman Enss, Hauke Biss, Henning Moritz, and Nicolò Defenu for fruitful discussions. The authors thank Henning Moritz and Markus Bohlen for providing their experimental\r\ndata.","doi":"10.1103/PhysRevA.103.L061303","month":"06","scopus_import":"1","oa_version":"Preprint","language":[{"iso":"eng"}],"external_id":{"isi":["000662296700014"],"arxiv":["2009.06491"]},"date_updated":"2025-07-10T12:01:58Z","date_published":"2021-06-01T00:00:00Z","author":[{"first_name":"A.","last_name":"Tononi","full_name":"Tononi, A."},{"id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","full_name":"Cappellaro, Alberto","last_name":"Cappellaro","orcid":"0000-0001-6110-2359","first_name":"Alberto"},{"last_name":"Bighin","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777","first_name":"Giacomo"},{"last_name":"Salasnich","full_name":"Salasnich, L.","first_name":"L."}],"title":"Propagation of first and second sound in a two-dimensional Fermi superfluid","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"citation":{"ista":"Tononi A, Cappellaro A, Bighin G, Salasnich L. 2021. Propagation of first and second sound in a two-dimensional Fermi superfluid. Physical Review A. 103(6), L061303.","ama":"Tononi A, Cappellaro A, Bighin G, Salasnich L. Propagation of first and second sound in a two-dimensional Fermi superfluid. <i>Physical Review A</i>. 2021;103(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">10.1103/PhysRevA.103.L061303</a>","chicago":"Tononi, A., Alberto Cappellaro, Giacomo Bighin, and L. Salasnich. “Propagation of First and Second Sound in a Two-Dimensional Fermi Superfluid.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">https://doi.org/10.1103/PhysRevA.103.L061303</a>.","apa":"Tononi, A., Cappellaro, A., Bighin, G., &#38; Salasnich, L. (2021). Propagation of first and second sound in a two-dimensional Fermi superfluid. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">https://doi.org/10.1103/PhysRevA.103.L061303</a>","short":"A. Tononi, A. Cappellaro, G. Bighin, L. Salasnich, Physical Review A 103 (2021).","ieee":"A. Tononi, A. Cappellaro, G. Bighin, and L. Salasnich, “Propagation of first and second sound in a two-dimensional Fermi superfluid,” <i>Physical Review A</i>, vol. 103, no. 6. American Physical Society, 2021.","mla":"Tononi, A., et al. “Propagation of First and Second Sound in a Two-Dimensional Fermi Superfluid.” <i>Physical Review A</i>, vol. 103, no. 6, L061303, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">10.1103/PhysRevA.103.L061303</a>."},"year":"2021","date_created":"2021-06-27T22:01:49Z","article_type":"letter_note","quality_controlled":"1","type":"journal_article","day":"01","volume":103,"publisher":"American Physical Society","publication":"Physical Review A","issue":"6","article_processing_charge":"No","status":"public","intvolume":"       103","_id":"9606","abstract":[{"lang":"eng","text":"Sound propagation is a macroscopic manifestation of the interplay between the equilibrium thermodynamics and the dynamical transport properties of fluids. Here, for a two-dimensional system of ultracold fermions, we calculate the first and second sound velocities across the whole BCS-BEC crossover, and we analyze the system response to an external perturbation. In the low-temperature regime we reproduce the recent measurements [Phys. Rev. Lett. 124, 240403 (2020)] of the first sound velocity, which, due to the decoupling of density and entropy fluctuations, is the sole mode excited by a density probe. Conversely, a heat perturbation excites only the second sound, which, being sensitive to the superfluid depletion, vanishes in the deep BCS regime and jumps discontinuously to zero at the Berezinskii-Kosterlitz-Thouless superfluid transition. A mixing between the modes occurs only in the finite-temperature BEC regime, where our theory converges to the purely bosonic results."}],"main_file_link":[{"url":"https://arxiv.org/abs/2009.06491","open_access":"1"}],"arxiv":1,"publication_status":"published"}]