BIMSA >
Category and Topological Order Seminar
Minimal extensions of symmetric fusion categories and Witt groups
Minimal extensions of symmetric fusion categories and Witt groups
Organizer
Speaker
Dmitri Nikshych
Time
Tuesday, November 15, 2022 9:30 AM - 11:00 AM
Venue
1129B
Online
Zoom 537 192 5549
(BIMSA)
Abstract
Groups of minimal extensions of symmetric fusion categories were introduced by Lan, Kong, and Wen to study symmetry protected topological phases of matter. We describe how these groups are related to categorical Witt groups and how to compute them using a categorical analogue of the Kunneth formula in group cohomology.