Orbifold groupoids
arXiv:2008.05960 · doi:10.1007/JHEP02(2021)132
Abstract
We review the properties of orbifold operations on two-dimensional quantum field theories, either bosonic or fermionic, and describe the "Orbifold groupoids" which control the composition of orbifold operations. Three-dimensional TQFT's of Dijkgraaf-Witten type will play an important role in the analysis. We briefly discuss the extension to generalized symmetries and applications to constrain RG flows.
50+12 pages, 15 figures, 3 tables, 4 appendices