English

Schur-Weyl duality for certain infinite dimensional $\rm{U}_q(\mathfrak{sl}_2)$-modules

Representation Theory 2019-01-09 v2

Abstract

Let VV be the two-dimensional simple module and MM be a projective Verma module for the quantum group of sl2\mathfrak{sl}_2 at generic qq. We show that for any r1r\ge 1, the endomorphism algebra of MVrM\otimes V^{\otimes r} is isomorphic to the type BB Temperley-Lieb algebra TLBr(q,Q)\rm{TLB}_r(q, Q) for an appropriate parameter QQ depending on MM. The parameter QQ is determined explicitly. We also use the cellular structure to determine precisely for which values of rr the endomorphism algebra is semisimple. A key element of our method is to identify the algebras TLBr(q,Q)\rm{TLB}_r(q,Q) as the endomorphism algebras of the objects in a quotient category of the category of coloured ribbon graphs of Freyd-Yetter or the tangle diagrams of Turaev and Reshitikhin.

Keywords

Cite

@article{arxiv.1811.01325,
  title  = {Schur-Weyl duality for certain infinite dimensional $\rm{U}_q(\mathfrak{sl}_2)$-modules},
  author = {Kenji Iohara and Gus Lehrer and Ruibin Zhang},
  journal= {arXiv preprint arXiv:1811.01325},
  year   = {2019}
}

Comments

45 pages, about 30 figures in xy-pic and tikz; some references have been added to the original version

R2 v1 2026-06-23T05:03:22.554Z