论文标题
弱相互作用的无序bose气体从平衡中出现：从多个散射到超流量
Weakly interacting disordered Bose gases out of equilibrium: from multiple scattering to superfluidity
论文作者
论文摘要
我们探讨了二维，弱相互作用无序的玻色气体的淬火动力学，以实现相互作用和混乱的各种相对强度。这使我们能够识别两个截然不同的平衡状态。当相互作用小于疾病时，气体会经历多个散射，并表现出短距离的空间连贯性。在短时间内，这种连贯性仅通过粒子能量的扩散过程而受到相互作用的平稳影响。当相互作用大于疾病时，散射停止，气体的行为越来越像流体，最终像低能量下的超氟。在超流体政权中，气体表现出远距离代数连贯性，这是疾病前热方案的特征。
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.
