标题： 在马尔可夫浴存在下的量子多体疤痕的鲁棒性 显示英文标题

标题： Robustness of quantum many-body scars in the presence of Markovian bath

摘要： 一个通用的闭合量子多体系统不可避免地趋于热化，其初始状态中编码的局部信息最终会分散到整个空间，这被称为量子遍历性。 在闭合量子系统中，强遍历性破坏的一个典型例外被称为多体局域化，其中强无序引起的局域化阻止了热化的发生。 普遍认为，一个局域化的量子系统在环境引起的耗散作用下会变得非局域。 然而，这一结果最近受到了挑战，其中提出了一种奇特的耗散诱导局域机制，并发现了局域相和扩展相之间的转变。 在本文中，我们将这一机制推广到具有弱遍历性破坏的系统，这些系统承载着量子多体伤痕（QMBS）。 我们发现，系统会弛豫到由QMBS主导的稳定状态，并且通过适当制备初始状态，耗散动力学表现出动态回波。 我们指出了一种在冷原子装置中实现受控耗散的实验方案。 这使得遍历性破坏的特征在耗散动力学中可见，并为实验上制备具有相关相干动力学的稳定QMBS提供了潜在的可能性。 显示英文摘要

摘要： A generic closed quantum many-body system will inevitably tend to thermalization, whose local information encoded in the initial state eventually scrambles into the full space, known as quantum ergodicity. A paradigmatic exception in closed quantum systems for strong ergodicity breaking is known as many-body localization, where strong disorder-induced localization prevents the occurrence of thermalization. It is generally recognized that a localized quantum system would be delocalized under dissipation induced by the environment. However, this consequence recently has received challenges where an exotic dissipation-induced localization mechanism is proposed, and transitions between localized and extended phases are found. In this Letter, we promote this mechanism to systems for weak ergodicity breaking hosting quantum many-body scars (QMBS). We find that the system relaxes to a steady state dominated by QMBS, and the dissipative dynamics exhibit dynamic revivals by suitably preparing an initial state. We point out an experimental realization of the controlled dissipation with a cold atomic setup. This makes the signature of ergodicity breaking visible over dissipative dynamics and offers potential possibilities for experimentally preparing stable QMBS with associated coherent dynamics.