Quivers with quantum Yang-Baxter equation and Hecke condition: Deformation of face algebras

Abstract

In this paper, we initiate the study of quivers carrying quantum Yang--Baxter and Hecke structure. Calling a quiver $Q$ to be a solution of the QYBE when the adjacency matrix of its Kronecker square is a solution, we show that this holds precisely when the adjacency matrix $A$ satisfies $A^2=\mu A$ for a scalar $\mu$. We determine exactly when Kulish's rank-one construction yields a Hecke $R$-matrix that satisfies both the braided QYBE and the Hecke condition. We deform Hayashi's face algebra by the resulting RTT relations, and prove that the quantum matrix algebra ${\mathcal{O}}_q(M_n)$ is isomorphic as a bialgebra to the Hecke-deformed face algebra of the rose quiver with $n$ petals, and that for a disjoint union of $m$ such roses the deformation is a genuine quantum groupoid with $m$-dimensional base, isomorphic as an algebra to $m^2$ copies of ${\mathcal{O}}_q(M_n)$.