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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2024
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| Online Access: | https://arxiv.org/abs/2405.08606 |
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| _version_ | 1866915218975621120 |
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| author | Duval, Clément Cherroret, Nicolas |
| author_facet | Duval, Clément Cherroret, Nicolas |
| contents | We present a quantitative description of the thermalization dynamics of far-from-equilibrium, two-dimensional (2D) Bose superfluids. Our analysis leverages a quantum kinetic formalism and allows us to identify two successive regimes of relaxation: an initial damping of quasi-particles due to Landau scattering processes, followed by the slower establishment of a global equilibrium at long time. For a far-from-equilibrium initial state, we find that Landau damping differs from the conventional picture of exponentially relaxing quasi-particles. Moreover, our results showcase a pronounced mechanism of algebraic transport at late times, rooted in energy conservation and compatible with 2D diffusion. Using theoretical and numerical arguments, we construct a detailed dynamical portrait of global equilibration in 2D superfluids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_08606 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Anomalous Landau damping and algebraic thermalization in two-dimensional superfluids far from equilibrium Duval, Clément Cherroret, Nicolas Quantum Gases Quantum Physics We present a quantitative description of the thermalization dynamics of far-from-equilibrium, two-dimensional (2D) Bose superfluids. Our analysis leverages a quantum kinetic formalism and allows us to identify two successive regimes of relaxation: an initial damping of quasi-particles due to Landau scattering processes, followed by the slower establishment of a global equilibrium at long time. For a far-from-equilibrium initial state, we find that Landau damping differs from the conventional picture of exponentially relaxing quasi-particles. Moreover, our results showcase a pronounced mechanism of algebraic transport at late times, rooted in energy conservation and compatible with 2D diffusion. Using theoretical and numerical arguments, we construct a detailed dynamical portrait of global equilibration in 2D superfluids. |
| title | Anomalous Landau damping and algebraic thermalization in two-dimensional superfluids far from equilibrium |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2405.08606 |