What's done cannot be undone
组织者
演讲者
邵書珩
时间
2022年10月13日 21:00 至 22:30
地点
Online
线上
Zoom 204 323 0165
(BIMSA)
摘要
I will give an overview on non-invertible global symmetries in general spacetime dimensions, based on a series of work from last year. A crucial element in these constructions is the gauging of a higher-form global symmetry in either half of the spacetime (half gauging), or along a higher codimensional manifold (higher gauging). I will then discuss a new non-invertible global symmetry in the real-world QED and QCD, and argue that the neutral pion decay can be understood in terms of this generalized global symmetry.