Exponential decay of correlations for random interval diffeomorphisms

preprint2026arXivOpen access

Abstract

We consider a finite number of orientation preserving C2C^2 interval diffeomorphisms and apply them randomly in such a way that the expected Lyapunov exponents at the boundary points are positive. We prove the exponential decay of correlations for Lipschitz observables with respect to the unique stationary measure supported on the interior of the interval. The key step is to show the exponential synchronization in average.

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