Weakly interacting disordered Bose gases out of equilibrium: from multiple scattering to superfluidity
arXiv:2012.05526 · doi:10.1209/0295-5075/132/66001
Abstract
We explore the quench dynamics of a two-dimensional, weakly interacting disordered Bose gas for various relative strengths of interactions and disorder. This allows us to identify two well distinct out-of-equilibrium regimes. When interactions are smaller than the disorder, the gas experiences multiple scattering and exhibits a short-range spatial coherence. At short time this coherence is only smoothly affected by interactions, via a diffusion process of the particles' energies. When interactions are larger than the disorder, scattering ceases and the gas behaves more and more like a fluid, ultimately like a superfluid at low energy. In the superfluid regime, the gas exhibits a long-range algebraic coherence, characteristic of a pre-thermal regime in disorder.
arXiv comment6 pages, 4 figures
References in corpus (23)
- Nonequilibrium dynamics of closed interacting quantum systems
- Metal-insulator transition in a weakly interacting many-electron system with localized single-particle states
- Many-body localization, thermalization, and entanglement
- One dimensional Bosons: From Condensed Matter Systems to Ultracold Gases
- Probing the relaxation towards equilibrium in an isolated strongly correlated 1D Bose gas
- Relaxation and Pre-thermalization in an Isolated Quantum System
- Light-cone-like spreading of correlations in a quantum many-body system
- Experimental Observation of a Generalized Gibbs Ensemble
- Prethermalization
- Extension of Bogoliubov theory to quasi-condensates
- Finite temperature phase transition for disordered weakly interacting bosons in one dimension
- Weak chaos in the disordered nonlinear Schroedinger chain: destruction of Anderson localization by Arnold diffusion
- Coherent Backscattering of Ultracold Atoms
- Atom cooling and trapping by disorder
- Coherent Backscattering of Ultracold Matter Waves: Momentum Space Signatures
- Enhanced backscattering of a dilute Bose-Einstein condensate
- Thermalization of Strongly Disordered Nonlinear Chains
- Momentum distribution and coherence of a weakly interacting Bose gas after a quench
- Kinetic Theory for Interacting Luttinger Liquids
- Quench dynamics of a weakly interacting disordered Bose gas in momentum space
- Long-range correlations of density in a Bose-Einstein condensate expanding in a random potential
- Postquench prethermalization in a disordered quantum fluid of light
- Classical Casimir force from a quasi-condensate of light
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- Dynamical emergence of a Kosterlitz-Thouless transition in a disordered Bose gas following a quench
- Low-energy prethermal phase and crossover to thermalization in nonlinear kicked rotors
- Localization landscape for interacting Bose gases in one-dimensional speckle potentials
- Quench dynamics of disordered quadrupolar Bose-Einstein condensates
- From inverse-cascade to sub-diffusive dynamic scaling in driven disordered Bose fluids
- Critical speed of a binary superfluid of light