English

Categories of Weight Modules for Unrolled Restricted Quantum Groups at Roots of Unity

Representation Theory 2024-02-07 v3 Quantum Algebra

Abstract

Motivated by connections to the singlet vertex operator algebra in the g=sl2\mathfrak{g}=\mathfrak{sl}_2 case, we study the unrolled restricted quantum groups UqH(g)\overline{U}_q^H(\mathfrak{g}) at arbitrary roots of unity with a focus on its category of weight modules. We show that the braid group action on the Drinfeld-Jimbo algebra Uq(g)U_q(\mathfrak{g}) naturally extends to the unrolled quantum groups and that the category of weight modules is a generically semi-simple ribbon category (previously known only for odd roots) with trivial M\"{u}ger center. Projective covers of simple modules are shown to be self-dual, and some preliminary connections to the higher rank singlet vertex operator algebras are motivated.

Keywords

Cite

@article{arxiv.1910.05922,
  title  = {Categories of Weight Modules for Unrolled Restricted Quantum Groups at Roots of Unity},
  author = {Matthew Rupert},
  journal= {arXiv preprint arXiv:1910.05922},
  year   = {2024}
}

Comments

Added Remark 4.9 and other minor corrections