Cleft Extensions and Quotients of Twisted Quantum Doubles
Quantum Algebra
2015-11-10 v1 High Energy Physics - Theory
Group Theory
Rings and Algebras
Representation Theory
Abstract
Given a pair of finite groups and a normalized 3-cocycle of , where acts on as automorphisms, we consider quasi-Hopf algebras defined as a cleft extension where denotes some suitable cohomological data. When is a quotient of by a central subgroup acting trivially on , we give necessary and sufficient conditions for the existence of a surjection of quasi-Hopf algebras and cleft extensions of the type . Our construction is particularly natural when acts on by conjugation, and is a twisted quantum double . In this case, we give necessary and sufficient conditions that Rep() is a modular tensor category.
Keywords
Cite
@article{arxiv.1404.2016,
title = {Cleft Extensions and Quotients of Twisted Quantum Doubles},
author = {Geoffrey Mason and Siu-Hung Ng},
journal= {arXiv preprint arXiv:1404.2016},
year = {2015}
}
Comments
LaTex; 14 pages