Tensor powers of vector representation of $U_q(\mathfrak{sl}_2)$ at even roots of unity
Representation Theory
2024-07-30 v2
Abstract
We study the decomposition of tensor powers of two dimensional irreducible representations of quantum at even roots of unity into direct sums of tilting modules. We derive a combinatorial formula for multiplicity of tilting modules in the -th tensor power of two dimensional irreducible representations, interpret it in terms of lattice paths and find its asymptotic behavior when . We also describe the limit of character and Plancherel measures when . We consider both with divided powers and the small quantum .
Cite
@article{arxiv.2404.03933,
title = {Tensor powers of vector representation of $U_q(\mathfrak{sl}_2)$ at even roots of unity},
author = {Anna Lachowska and Olga Postnova and Nicolai Reshetikhin and Dmitry Solovyev},
journal= {arXiv preprint arXiv:2404.03933},
year = {2024}
}
Comments
43 pages