$C^*$-algebras associated with textile dynamical systems

Abstract

A $C^*$-symbolic dynamical system $({\cal A}, \rho, \Sigma)$ is a finite family $\{\rho_\alpha\}_{\alpha \in\Sigma}$ of endomorphisms of a $C^*$-algebra ${\cal A}$ with some conditions. It yields a $C^*$-algebra ${\cal O}_\rho$ from an associated Hilbert $C^*$-bimodule. In this paper, we will extend the notion of $C^*$-symbolic dynamical system to $C^*$-textile dynamical system $({\cal A}, \rho, \eta, {\Sigma^\rho}, {\Sigma^\eta}, \kappa)$ which consists of two $C^*$-symbolic dynamical systems $({\cal A}, \rho, {\Sigma^\rho})$ and $({\cal A}, \eta, {\Sigma^\eta})$ with certain commutation relations $\kappa$ between their endomorphisms $\{\rho_\alpha\}_{\alpha \in \Sigma^\rho}$ and $\{\eta_a \}_{a \in \Sigma^\eta}$. $C^*$-textile dynamical systems yield two-dimensional subshifts and $C^*$-algebras ${\cal O}^{\kappa}_{\rho,\eta}$. We will study the structure of the algebras ${\cal O}^\kappa_{\rho,\eta}$ and present its K-theory formulae.