English

Two Boundary Centralizer Algebras for $\mathfrak{q}(n)$

Representation Theory 2020-04-14 v2

Abstract

We define the degenerate two boundary affine Hecke-Clifford algebra Hd\mathcal{H}_d, and show it admits a well-defined q(n)\mathfrak{q}(n)-linear action on the tensor space MNVdM\otimes N\otimes V^{\otimes d}, where VV is the natural module for q(n)\mathfrak{q}(n), and M,NM, N are arbitrary modules for q(n)\mathfrak{q}(n), the Lie superalgebra of Type Q. When MM and NN are irreducible highest weight modules parameterized by a staircase partition and a single row, respectively, this action factors through a quotient of Hd\mathcal{H}_d. We then construct explicit modules for this quotient, Hp,d\mathcal{H}_{p,d}, using combinatorial tools such as shifted tableaux and the Bratteli graph. These modules belong to a family of modules which we call calibrated. Using the relations in Hp,d\mathcal{H}_{p,d}, we also classify a specific class of calibrated modules. The irreducible summands of MNVdM\otimes N\otimes V^{\otimes d} coincide with the combinatorial construction, and provide a weak version of the Schur-Weyl type duality.

Keywords

Cite

@article{arxiv.1901.10328,
  title  = {Two Boundary Centralizer Algebras for $\mathfrak{q}(n)$},
  author = {Jieru Zhu},
  journal= {arXiv preprint arXiv:1901.10328},
  year   = {2020}
}
R2 v1 2026-06-23T07:25:41.445Z