Large deviations for random walks in a random environment on a strip

We consider a random walk in a random environment (RWRE) on the strip of finite width $\mathbb{ Z} \times \{ 1,2,\ldots,d\}$. We prove both quenched and averaged large deviation principles for the position and the hitting times of the RWRE. Moreover, we prove a variational formula that relates the quenched and averaged rate functions, thus extending a result of Comets, Gantert, and Zeitouni for nearest-neighbor RWRE on $\mathbb{ Z}$

Categories: math.PR