2021/09/24 by Carly Briggs, Briggs, Carly, Cristian Lenart +3 · 1 citation
Mathematics · #Advanced Combinatorial Mathematics #Advanced Topics in Algebra #Algebraic structures and combinatorial models #Combinatorics (math.CO) #FOS: Mathematics #Primary 05E10 #Representation Theory (math.RT) #Secondary 20G42
paper · pdf · doi:10.48550/arxiv.2109.12199
openalex publication_date 2021/09/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The tableau model for Kirillov-Reshetikhin (KR) crystals, which are finite dimensional crystals corresponding to certain affine Lie algebras, is commonly used for its ease of crystal operator calculations. However, its simplicity makes quite complex the calculation of statistics such as: keys (used to express Demazure characters), the crystal energy function (an affine grading on tensor products of KR crystals), and the combinatorial R-matrix (an affine crystal isomorphism permuting factors in a tensor product of KR crystals). It has been shown that these calculations are much simpler with the added structure in the quantum alcove model for KR crystals. In this paper, we give an explicit description of the crystal isomorphism between the mentioned realizations of KR crystals in all classical Lie types.