南开大学

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 talk, I will promote this mechanism to systems for weak ergodicity breaking hosting quantum many-body scars (QMBS) where they relax to the steady state dominated by QMBS, and the dissipative dynamics exhibit dynamic revivals by suitably preparing initial states. We point out an experimental realization of the controlled dissipation with cold atomic setup held in Rydberg atom arrays. This makes the signature of ergodicity breaking visible over dissipative dynamics and offers potential possibilities for experimentally preparing stable QMBS with associated coherent dynamics.

报告人简介：

潘磊，南开大学物理学院现代物理系副教授。2019年博士毕业于中科院物理所，导师陈澍研究员、崔晓玲研究员。2019-2022年在清华大学高等研究院从事博士后研究，2022年底入职南开大学物理学院。主要从事超冷原子和低维凝聚态系统的理论研究，近年来的研究兴趣主要集中于量子开放系统中的可积性、局域化以及量子多体疤痕态及其耗散动力学理论。

地点：M830

邀请人：胡海平（82649070）