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Article Dans Une Revue Phys.Rev.A Année : 2022

Dynamical emergence of a Kosterlitz-Thouless transition in a disordered Bose gas following a quench

Résumé

We study the dynamical evolution of a two-dimensional Bose gas after a disorder potential quench. Depending on the initial conditions, the system evolves either to a thermal or a superfluid state. Using extensive quasiexact numerical simulations, we show that the two phases are separated by a Kosterliz-Thouless transition. The thermalization time is shown to be longer in the superfluid phase, but no critical slowing down is observed at the transition. The long-time phase diagram is well reproduced by a simple theoretical model. The spontaneous emergence of Kosterlitz-Thouless transitions following a quench is a generic phenomenon that should arise both in the context of nonequilibrium quantum gases and in the context of nonlinear classical wave systems.

Dates et versions

hal-03681394 , version 1 (30-05-2022)

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Thibault Scoquart, Dominique Delande, Nicolas Cherroret. Dynamical emergence of a Kosterlitz-Thouless transition in a disordered Bose gas following a quench. Phys.Rev.A, 2022, 106 (2), pp.L021301. ⟨10.1103/PhysRevA.106.L021301⟩. ⟨hal-03681394⟩
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