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arXiv 1404.0885cond-mat.str-el
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无序势中一维相互作用玻色子的猝灭动力学:弹性退相和热化的临界加速

Quench dynamics of one-dimensional interacting bosons in a disordered potential: Elastic dephasing and critical speeding-up of thermalization

Marco Tavora, Achim Rosch, Aditi Mitra

摘要:

研究了一维弱无序势突然开启后相互作用玻色子的动力学行为。在准粒子散射之前的时间尺度上(预热化区),随机弹性前向散射的失相导致所有相关性以指数方式快速衰减,但系统仍然远离热平衡。在较长的时间内,无序和相互作用的组合效应引起非弹性散射和热化。一个新的量子动力学方程的帐户的无序和相互作用的动力学研究。热化原来是最有效的超流玻色玻璃临界点,非线性变得越来越重要。数值计算得到的热化时间与解析估计吻合得很好。

英文摘要:

The dynamics of interacting bosons in one dimension following the sudden switching on of a weak disordered potential is investigated. On time scales before quasiparticles scatter (prethermalized regime), the dephasing from random elastic forward scattering causes all correlations to decay exponentially fast, but the system remains far from thermal equilibrium. For longer times, the combined effect of disorder and interactions gives rise to inelastic scattering and to thermalization. A novel quantum kinetic equation accounting for both disorder and interactions is employed to study the dynamics. Thermalization turns out to be most effective close to the superfluid-Bose glass critical point where nonlinearities become more and more important. The numerically obtained thermalization times are found to agree well with analytic estimates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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