Theoretical Physics Seminar: Matthew Buican
- Date: –15:15
- Location: Zoom: https://uu-se.zoom.us/j/66168579767
- Lecturer: Matthew Buican (Queen Mary, U. of London)
- Contact person: Luca Cassia
Title: aXb=c in 2+1D TQFT
Abstract: I will start by giving a gentle introduction to 2+1D topological quantum field theory (TQFT), the fusion of line operators in these theories, and how 1-form symmetry arises. I will then discuss recent work in which we study fusions that are, in a sense I will explain, generalizations of 1-form symmetry and reveal much about global properties of TQFT. I will illustrate the discussion with various examples from 2+1D discrete gauge theories to Chern-Simons theories with continuous gauge groups and mention various open problems.