Regularity of the drift for random walks in groups acting on Gromov hyperbolic spaces

Abstract

In this work we prove the continuity and existence of large deviations for the drift of random walks on groups acting by isometries on Gromov Hyperbolic Spaces. Through the process we refine the multiplicative ergodic theorem of Karlsson and Gou\"ezel for such spaces. The works goes beyond what is known in the literature by allowing spaces that are not necessarily proper.