Gauging the Categorical Connes' $\tilde{\chi}(M)$
Operator Algebras
2026-04-24 v1 Category Theory
Quantum Algebra
Abstract
We prove that if a finite group acts outerly on a McDuff factor , then is a braided monoidal full subcategory of the categorical Connes' defined in arXiv:2111.06378, where and are the centrally trivial and approximately inner parts in respectively. When is trivial, we give an explicit formula for the -gauging procedure on . This is the categorical generalization of Connes' short exact sequence on . Using this machinery, for any finite group , we construct a McDuff factor , whose is braided equivalent to . This is the first example of a braided fusion category which is not modular as .
Cite
@article{arxiv.2604.21833,
title = {Gauging the Categorical Connes' $\tilde{\chi}(M)$},
author = {Quan Chen},
journal= {arXiv preprint arXiv:2604.21833},
year = {2026}
}
Comments
36 pages, several tikz figures