Gauging 2-group Symmetries in 3d via Orbifold Data
Organizers
Speaker
Benjamin Haake
Time
Tuesday, May 20, 2025 4:00 PM - 6:00 PM
Venue
A3-1-103
Online
Zoom 468 248 1222
(BIMSA)
Abstract
I will motivate how 2-group symmetries arise from natural interactions between 0- and 1-form symmetries, how to gauge 2-group symmetries, and how they are formulated in the context of defect TQFTs. Following the insight that global symmetries can be described by topological defects, a natural question is how to gauge symmetries (and higher-form symmetries in particular) from this perspective. I will motivate the orbifold construction as a tool for gauging and present a new construction that produces a candidate orbifold datum from finite 2-group symmetries in 3d. Lastly, I will use this construction to recover a known class of orbifold data from a 0-form symmetry and show how its gauging can be undone by gauging an emergent 1-form symmetry.