主 讲 人 ：金亮    教授

活动时间：11月03日14时30分    

地　　点：腾讯会议：774 329 883

讲座内容：

The way of non-Hermiticity appearance matters for the system topology. In this talk, we review our recentprogresses in non-Hermitian topological phases. We first show the breakdown of conventional bulk-boundary correspondence and explainit from the aviewpoint of non-HermitianAharonov-Bohm effect. We show that the inversion symmetry andcombined-inversion symmetry play an important role for the validity of conventional bulk-boundary correspondence. Then, we will talk about that the topological phase transition,the topological invariant, and the existence of edge states may not be altered, being independent of the non-Hermitian phase transition, if the non-Hermiticityis properly introduced. Finally; we will show a graphic approach proposedfor the visualization of topological phases. The rich topological phases of eitherHermitian or non-Hermitian band touching, and either trivial or nontrivialphases are distinguishable from the eigenstate graphs.

主讲人介绍：

金亮，南开大学，物理科学学院教授、博士生导师。2003-2012年在南开大学物理科学学院学习并取得了理学学士、博士学位；2012-2015年期间在香港中文大学物理系从事博士后研究；2015年7月加入南开大学物理科学学院。主要从事非厄米系统的物理性质、动力学、及其应用的理论研究，近年来主要研究非厄米光子学、非厄米拓扑等。