Video URL
https://pirsa.org/19090100Gapped boundary theories for 3d Chern-Simons
Dan Freed Harvard University
Source RepositoryPIRSA
Collection
Talk Type
Scientific Series
Subject
Abstract
I will discuss a theorem, joint work in progress with Constantin Teleman, in which we characterize which topological 3-dimensional Chern-Simons theories admit nonzero boundary theories. Accepting some physical heuristics, it tells which gapped systems in 2+1 dimensions admit only gapless boundary systems.