报告人：李庆华 教授（新加坡国立大学）

时 间：2026年09月18日（周五）下午 15:00

地 点：北京理工大学良乡校区物理实验中心229会议室

摘要：

非厄米趋肤效应（non-Hermitian skin effect, NHSE）、奇异点（exceptional point, EP）灵敏度等非厄米物理现象在厄米体系中无对应，近年已深刻重构了学界对能带结构与拓扑物理的认知。本报告将介绍若干拓展非厄米新奇现象范畴的新思路，包括体系尺度依赖的广义布里渊区（generalized Brillouin zone, GBZ），以及碎片化、空间非均匀的广义布里渊区。报告还将重点阐释：非厄米趋肤效应如何与奇异点的几何亏损性相互耦合，催生具有超体积律负纠缠熵标度的新奇奇异束缚能带；此外还将系统梳理近期基于幺正量子模拟器实现非厄米动力学模拟的研究进展。

简历：

李庆华副教授，斯坦福大学博士，师从祁晓亮教授。2020年加入新加坡国立大学，现任院长讲席教授，领衔研究团队深耕非厄米新奇物理现象及其在经典和量子平台的模拟研究。李庆华教授长期在顶级学术期刊发表高水平成果，谷歌学术总被引次数逾12000次。

联系方式：zhangxd@bit.edu.cn

邀请人： 张向东 教授

网 址：http://physics.bit.edu.cn/

承办单位：物理学院、先进光电量子结构设计与测量教育部重点实验室

*Reporter：Prof Ching Hua Lee (National University of Singapore)

*Time：Sep. 18th , 2026 (Friday) 15:00

*Place：Room 229 Physics Center, Liangxiang Campus

*Contact Person: Xiangdong Zhang, Professor, zhangxd@bit.edu.cn

*Abstract:

Non-Hermitian phenomena such as the non-Hermitian skin effect (NHSE) and exceptional point sensitivity have no Hermitian analogs, and have lately reshaped the way we understand band structures and topology. In this talk, I shall introduce some new ideas that extend the current list of novel non-Hermitian phenomena, such as system-size dependent generalized Brillouin zones (GBZs), as well as GBZs that are fragmented or spatially nonconstant. I shall also highlight how the NHSE can interplay with the geometric defectiveness of exceptional points to lead to novel exceptional bound bands with super volume-law negative entanglement scaling. I will also review how non-Hermitian dynamics have been recently simulated in unitary quantum simulators.

*Profile：

Assoc. Prof. Ching Hua Lee obtained a PhD from Stanford University under the tutelage of Prof Xiaoliang Qi. He joined the National University of Singapore in 2020, and is now the Dean's Chair Professor, heading a team focusing on exploring novel non-Hermitian phenomena, as well as their simulation on classical and quantum platforms. Prof Lee publishes regularly in top scientific journals, and has been cited over 12000 times.