Quantum kinetics of quenched two-dimensional Bose superfluids - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phys.Rev.A Année : 2023

Quantum kinetics of quenched two-dimensional Bose superfluids

Clément Duval
  • Fonction : Auteur
  • PersonId : 1322618
  • IdRef : 273761706

Résumé

We study theoretically the non-equilibrium dynamics of a two-dimensional (2D) uniform Bose superfluid following a quantum quench, from its short-time (prethermal) coherent dynamics to its long-time thermalization. Using a quantum hydrodynamic description combined with a Keldysh field formalism, we derive quantum kinetic equations for the low-energy phononic excitations of the system and characterize both their normal and anomalous momentum distributions. We apply this formalism to the interaction quench of a 2D Bose gas and study the ensuing dynamics of its quantum structure factor and coherence function, both recently measured experimentally. Our results indicate that in two dimensions, a description in terms of independent quasi-particles becomes quickly inaccurate and should be systematically questioned when dealing with non-equilibrium scenarios.

Dates et versions

hal-04017309 , version 1 (07-03-2023)

Identifiants

Citer

Clément Duval, Nicolas Cherroret. Quantum kinetics of quenched two-dimensional Bose superfluids. Phys.Rev.A, 2023, 107 (4), pp.043305. ⟨10.1103/PhysRevA.107.043305⟩. ⟨hal-04017309⟩
32 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More