Nonequilibrium Dynamics of Long-Range Interacting Fermions

Article Article scientifique Article Nonequilibrium Dynamics of Long-Range Interacting Fermions eng 2025-06-10 author Zwettler T. 0000-0001-9667-0268 author Del Pace G. 0000-0002-0882-2143 author Marijanovic F. 0009-0007-3629-5030 author Chattopadhyay S. author Bühler T. 0009-0004-9930-5513 author Halati Catalin-Mihai 0000-0002-8344-5595 Université de Genève 974133 author Skolc L. 0009-0005-0572-3309 author Tolle Luisa 0009-0009-6235-8802 Université de Genève 403067 author Helson V. 0000-0003-0499-4498 author Bolognini G. 0009-0007-3911-6552 author Fabre A. author Uchino S. 0000-0002-3007-1753 author Giamarchi Thierry 0000-0001-7409-5071 Université de Genève 134665 Département de physique de la matière quantique (FIMAC) author Demler E. 0000-0002-2499-632X author Brantut J. p. 021089 10.1103/PhysRevX.15.021089 2160-3308 https://link.aps.org/doi/10.1103/PhysRevX.15.021089 <p>A fundamental problem of out-of-equilibrium physics is the speed at which the order parameter grows upon crossing a phase transition. Here, we investigate the ordering dynamics in a Fermi gas undergoing a density-wave phase transition induced by quenching infinite-range, cavity-mediated interactions. We observe, in real time, the exponential rise of the order parameter and track its growth over several orders of magnitude. Remarkably, the growth rate can exceed the Fermi energy by an order of magnitude, consistent with predictions from a linearized instability analysis. This case contrasts with the ordering process driven by short-range interactions. We then generalize our results to linear interaction ramps, where deviations from the adiabatic behavior are captured by a simple dynamical ansatz. Our study offers a paradigmatic example of the interplay between strong short- and long-range interactions in quantum nonequilibrium dynamics.</p> Dewey 500.2 Staatssekretariat für Bildung, Forschung und Innovation UeM019-1 Army Research Office W911NF-21-1-0184 Kavli Institute for Theoretical Physics, University of California, Santa Barbara NSF PHY-1748958 Japan Science and Technology Agency JPMJPR235 Japan Society for the Promotion of Science JP21K03436 Institut Henri Poincaré UAR 839 Labex ANR-10-LABX-59-01 Deutsche Forschungsgemeinschaft 277625399—TRR 185 Cluster of Excellence Matter and Light for Quantum Computing EXC 2004/1–390534769 Swiss National Science Foundation Non-perturbative approaches to strongly correlated many-body systems 212899 CH Swiss National Science Foundation Low dimensional quantum fluids 188687 CH 33 Département de physique de la matière quantique 131 false 780 Groupe Giamarchi Physical Review. X 15 2 2b8cb3db-bb6a-46d1-8e01-3ff22e8c4e3b Article (Published version) Public Article_scientifique_from_crossref.pdf 2139718 application/pdf CC BY-4.0 63d10baa5b0901b7eb0ef81f32badcedf0d136fac176a552355ca2bbf0d72fbe openAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Nonequilibrium Dynamics of Long-Range Interacting Fermions	Physical Review. X			2025	6	8

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