Speaker：Weiguang Cao （曹伟光） 

Affiliation：University of Southern Denmark

Time: April 17, 2026 (Friday) 10:00-11:00 am

Venue：中南大学潇湘校区物理楼541

Tencent Meeting: 730-795-041 (password: 1927)

Abstract: Recently, the notion of symmetry has been generalized, including high form, subsystem, and noninvertible symmetries. These novel symmetries have extended our understanding of topological phases of matter. In this talk, I will review the recent development on generalized symmetry, with a focus on noninvertible symmetry and the phases protected by it. I will present a general method to classy a broad class of noninvertible symmetry protected topological phases (NISPTs), together with concrete lattice realizations. Finally I will show that NISPT is a natural platform to exhibit the connection between noninvertibility and entanglement. 

报告人简介：曹伟光博士在东京大学获得博士学位。博士毕业后在南丹麦大学量子数学中心开展博士后研究工作。研究兴趣是从对称性的角度来理解凝聚态多体系统中的困难问题，比如拓扑物相的分类。最近的主要关注方向是广义对称性中的不可逆对称性及其在凝聚态物理和量子信息中的应用。