Genericity of trivial Lyapunov spectrum for Lp-cocycles derived from second order linear homogeneous differential equations

Abstract

We consider a probability space M on which an ergodic flow φt:M→M is defined. We study a family of continuous-time linear cocycles, referred to as kinetic, that are associated with solutions of the second-order linear homogeneous differential equation x¨+α(φt(ω))x˙+β(φt(ω))x=0. Here, the parameters α and β evolve along the φt-orbit of ω∈M. Our main result states that for a generic subset of kinetic continuous-time linear cocycles, where generic means a Baire second category with respect to an Lp-like topology on the infinitesimal generator, the Lyapunov spectrum is trivial.