Tube representations and twisting of graded categories

Abstract

We study deformation of tube algebra under twisting of graded monoidal categories. When a tensor category $\mathcal{C}$ is graded over a group $\Gamma$, a torus-valued 3-cocycle on $\Gamma$ can be used to deform the associator of $\mathcal{C}$. Based on a natural Fell bundle structure of the tube algebra over the action groupoid of the adjoint action of $\Gamma$, we show that the tube algebra of the twisted category is a 2-cocycle twisting of the original one.

v2: expanded remark on Kazhdan-Wenzl categories, other minor changes, 18 pages; v1: 16 pages

References in corpus (4)

• Representation theory for subfactors, $\lambda$-lattices and C*-tensor categories
• Representation Theory of Twisted Group Double
• Equivalence and Disintegration Theorems for Fell Bundles and their C*-algebras
• Tube algebra of group-type subfactors