What's Done Cannot be Undone: Non-invertible Symmetry

Abstract

The speaker will give an overview on non-invertible global symmetries based on a series of works done in the past year. In particular, he will discuss how the Krammers-Wannier duality of the 2d Ising model can be understood as a non-invertible global symmetry. Then, the speaker will discuss a new non-invertible global symmetry in QED and real-world QCD in the massless limit and show that the neutral pion decay can be understood as a consequence of this generalized global symmetry. He will conclude with a summary highlighting some of the important progress on this subject.

About the Speaker

Dr. LAM Ho Tat is currently a postdoctoral researcher at MIT working on the intersection of high energy theory and condensed matter theory. Before this he obtained a PhD in Physics from Princeton University following his MSc in Physics from Perimeter Institute for Theoretical Physics and a BSc in Physics and Mathematics from The Hong Kong University of Science and Technology (HKUST).

About the Program

For more information, please refer to the program website at http://iasprogram.ust.hk/particle_theory.

For Attendees' Attention

• Seating is on a first come, first served basis.