BIMSA > BIMSA TQFT and Higher Symmetries Seminar Orbifold data as gaugeable non-invertible symmetries
Orbifold data as gaugeable non-invertible symmetries
Organizers
Ansi Bai , Chun Chen , Liang Kong , Yi Long Wang , Zhi Hao Zhang , Hao Zheng
Speaker
Nils Carqueville
Time
Tuesday, March 25, 2025 4:00 PM - 6:00 PM
Venue
A3-1-301
Online
Zoom 468 248 1222 (BIMSA)
Abstract
Orbifold data are defects in topological quantum field theories which can be gauged to obtain a new TQFT. Examples include gaugings of (higher) group actions, state sum models, and more generally gaugings of "non-invertible symmetries". The defining conditions of orbifold data encode invariance under the choice of defect network used in the gauging process, which has been rigorously developed in arbitrary dimensions. The talk gives an introduction to the orbifold construction and illustrates it with examples in dimensions 2,3, and 4.