Universal Vertex-IRF Transformation for Quantum Affine Algebras

Eric Buffenoir; Philippe Roche; Véronique Terras

paper

Universal Vertex-IRF Transformation for Quantum Affine Algebras

arXiv:0707.0955

Abstract

We construct a universal Vertex-IRF transformation between Vertex type universal solution and Face type universal solution of the quantum dynamical Yang-Baxter equation. This universal Vertex-IRF transformation satisfies the generalized coBoundary equation and is an extension of our previous work to the quantum affine $U_{q} (A_{r}^{(1)})$ case. This solution has a simple Gauss decomposition which is constructed using Sevostyanov's characters of twisted quantum Borel algebras. We show that the evaluation of this universal solution in the evaluation representation of $U_{q} (A_{1}^{(1)})$ gives the standard Baxter's transformation between the 8-Vertex model and the IRF height model.

58 pages