One-dimensional finite range random walk in random medium and invariant measure equation

Julien Brémont (1)

1 LAMA - Laboratoire d'Analyse et de Mathématiques Appliquées

We consider a model of random walks on Z with finite range in a stationary and ergodic random environment. We first provide a fine analysis of the geometrical properties of the central left and right Lyapunov eigenvectors of the random matrix naturally associated with the random walk, highlighting the mechanism of the model. This allows to formulate a criterion for the existence of the absolutely continuous invariant measure for the environments seen from the particle. We then deduce a characterization of the non-zero-speed regime of the model.

Domaines: Systèmes dynamiques [math.DS]

Julien Brémont. One-dimensional finite range random walk in random medium and invariant measure equation. Annales de l'Institut Henri Poincaré (B) Probabilités et Statistiques, 2009, 45 (1), pp.70-103. ⟨hal-00794128⟩