近日，上海交通大学的蔡子课题组研究了移动无序晶格系统中物质波的局域化。相关成果已于2023年3月28日在国际学术期刊《物理评论A》上发表。

该课题组研究了具有均匀运动扰动势能的一维晶格系统中的定域现象。研究发现，在低速移动时，存在一个滑动定域相。在该相中，初始定域的物质波可以以绝热的方式跟随移动势能，而不会扩散，从而在多体动力学中产生初始状态记忆效应。

与标准的安德森定域相比，这种有趣的定域相有两个不同之处：它不具有相互作用的鲁棒性，但在缓慢变化的扰动时仍然存在。这种滑动定域相可以解释为移动准周期势下的波包路径干涉的结果，这些准周期势具有与晶格常数不成比例的不同周期。

此外，他们还讨论了实验实现和检测的可能性。

附：英文原文

Title: Localization of matter waves in lattice systems with moving disorder

Author: Chenyue Guo, Wenhao Cui, Zi Cai

Issue&Volume: 2023/03/28

Abstract: We study the localization phenomena in a one-dimensional lattice system with a uniformly moving disordered potential. At a low-moving velocity, we find a sliding localized phase in which the initially localized matter wave adiabatically follows the moving potential without diffusion, thus resulting in an initial state memory in the many-body dynamics. Such an intriguing localized phase distinguishes itself from the standard Anderson localization in two aspects: it is not robust against interaction, but persists in the presence of slowly varying perturbations. Such a sliding localized phase can be understood as a consequence of interference between the wave-packet paths under moving quasiperiodic potentials with various periods that are incommensurate with the lattice constant. The experimental realization and detection are also discussed.

DOI: 10.1103/PhysRevA.107.033330

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.107.033330