【学术视频】Non-Hermitian Topology and Dynamics | 南方科技大学陈伟强教授

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图 | 陈伟强

题   目：Classification of topological phases in one dimensional interacting non-Hermitian systems and emergent unitarity

报告人：陈伟强单   位：南方科技大学时   间：2019-11-30地   点：复旦大学

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报告摘要

Topological phases in non-Hermitian systems have become a fascinating subject recently. In this paper, we attempt to classify topological phases in 1D interacting non-Hermitian systems. We begin with the non-Hermitian generalization of Su-Schrieffer-Heeger (SSH) model and discuss its many body topological Berry phase, which is well defined for any interacting quasi-Hermitian systems (non-Hermitian systems that have real energy spectrum). We then demonstrate that the classifications of topological phases for quasi-Hermitian systems are exactly the same as their Hermitian counterparts. Moreover, we find that unitarity can even emerge for fixed point partition function describing topological phases in 1D non-Hermitian systems with local interactions. Thus we conjecture that for generic 1D interacting non-Hermitian systems, the classification of topological phases are exactly the same as Hermitian systems. 

个人简介

陈伟强，2000年获得清华大学物理系学士学位；2006年获得清华大学物理系博士学位；2006年-2008年在香港大学物理系做博士后研究；2008年-2011年任香港大学物理系研究助理教授；2011年至今，任职于南方科技大学物理系。研究领域为强关联系统、拓扑序与拓扑相变、张量网络计算。曾获得国家特聘专家（青年）等荣誉，入选深圳市海外高层次人才“孔雀计划”。

会议简介

会议名称：Fudan Mini-program on Non-Hermitian Topology and Dynamics

会议时间：2019年11月30日-12月1日

会议地点：上海

主办方：复旦大学

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