Quantum nilpotent subalgebras of classical quantum groups and affine crystals

TL;DR

It is shown that an analogue of RSK correspondence for type D due to Burge is an isomorphism of affine crystals and a generalization of Greene's formula fortype D is given.

Abstract

We study the crystal of quantum nilpotent subalgebra of $U_q(D_n)$ associated to a maximal Levi subalgebra of type $A_{n-1}$. We show that it has an affine crystal structure of type $D_n^{(1)}$ isomorphic to a limit of perfect Kirillov-Reshetikhin crystal $B^{n,s}$ for $s\geq 1$, and give a new polytope realization of $B^{n,s}$. We show that an analogue of RSK correspondence for type $D$ due to Burge is an isomorphism of affine crystals and give a generalization of Greene's formula for type $D$.

Theorems & Definitions (3)

• proof : Proof of Theorem \ref{['thm:epsilon^*_n']}
• proof : Proof of Theorem \ref{['thm:shape']}
• proof : Proof of Theorem \ref{['thm:isomorphism theorem']}