Quantization of classical dynamical $r$-matrices with nonabelian base

Abstract

We construct some classes of dynamical $r$-matrices over a nonabelian base, and quantize some of them by constructing dynamical (pseudo)twists in the sense of Xu. This way, we obtain quantizations of $r$-matrices obtained in earlier work of the second author with Schiffmann and Varchenko. A part of our construction may be viewed as a generalization of the Donin-Mudrov nonabelian fusion construction. We apply these results to the construction of equivariant star-products on Poisson homogeneous spaces, which include some homogeneous spaces introduced by De Concini.

40 pages; added references; corrected critical cocycle

Cited by in corpus (2)

• Quantum conjugacy classes of simple matrix groups
• Dynamical reflection equation