Speaker:

Erich Poppitz

Institution:

University of Toronto

Date:

Thursday, October 12, 2023

Time:

11:00 am

Location:

NSII 1201

**Abstract:**

I will explain how quantizing a four-dimensional gauge theory on a spatial torus with twisted boundary conditions provides a simple and useful view of anomalies involving center symmetry and (invertible or non-invertible) chiral symmetries. I will show that these anomalies imply exact degeneracies in the torus Hilbert space. These degeneracies hold at any size torus and thus have implications for the infinite volume phase structure.

Host:

Yuri Shirman