Non-equilibrium dynamics of long-range interacting Fermions
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arXiv
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866911891224264704 |
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| author | Zwettler, Timo del Pace, Giulia Marijanovic, Filip Chattopadhyay, Sambuddha Bühler, Tabea Halati, Catalin-Mihai Skolc, Luka Tolle, Luisa Helson, Victor Bolognini, Gaia Fabre, Aurélien Uchino, Shun Giamarchi, Thierry Demler, Eugene Brantut, Jean-Philippe |
| author_facet | Zwettler, Timo del Pace, Giulia Marijanovic, Filip Chattopadhyay, Sambuddha Bühler, Tabea Halati, Catalin-Mihai Skolc, Luka Tolle, Luisa Helson, Victor Bolognini, Gaia Fabre, Aurélien Uchino, Shun Giamarchi, Thierry Demler, Eugene Brantut, Jean-Philippe |
| contents | 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 dynamics of ordering in a Fermi gas undergoing a density-wave phase transition induced by quenching of long-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 is insensitive to the contact interaction strength from the ideal gas up to the unitary limit and can exceed the Fermi energy by an order of magnitude, in quantitative agreement with a linearized instability analysis. We then generalize our results to linear interaction ramps, where deviations from the adiabatic behaviour are captured by a simple dynamical ansatz. Our study offers a paradigmatic example of the interplay between non-locality and non-equilibrium dynamics, where universal scaling behaviour emerges despite strong interactions at the microscopic level. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_18204 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-equilibrium dynamics of long-range interacting Fermions Zwettler, Timo del Pace, Giulia Marijanovic, Filip Chattopadhyay, Sambuddha Bühler, Tabea Halati, Catalin-Mihai Skolc, Luka Tolle, Luisa Helson, Victor Bolognini, Gaia Fabre, Aurélien Uchino, Shun Giamarchi, Thierry Demler, Eugene Brantut, Jean-Philippe Quantum Gases Atomic Physics 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 dynamics of ordering in a Fermi gas undergoing a density-wave phase transition induced by quenching of long-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 is insensitive to the contact interaction strength from the ideal gas up to the unitary limit and can exceed the Fermi energy by an order of magnitude, in quantitative agreement with a linearized instability analysis. We then generalize our results to linear interaction ramps, where deviations from the adiabatic behaviour are captured by a simple dynamical ansatz. Our study offers a paradigmatic example of the interplay between non-locality and non-equilibrium dynamics, where universal scaling behaviour emerges despite strong interactions at the microscopic level. |
| title | Non-equilibrium dynamics of long-range interacting Fermions |
| topic | Quantum Gases Atomic Physics |
| url | https://arxiv.org/abs/2405.18204 |