Large Deviations for a Brownian Motion in a Drifted Brownian Potential

Abstract

We derive a large deviation principle both quenched and annealed for a one-dimensional diffusion process in a drifted Brownian environment providing the continuous time analogue of what Comets, Gantert and Zeitouni recently establish for the random walk in random environment. A key-ingredient, Kotani’s lemma, allows us to compute the corresponding rate functions. The results are more explicit than in the discrete-time setting.