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On the invariant measure of a positive recurrent diffusion in R

Michele L. Baldini
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Abstract

Given an one-dimensional positive recurrent diffusion governed by the Stratonovich SDE \[ X_t=x+\int_0^tσ(X_s)\strat db(s)+\int_0^t m(X_s) ds, \] we show that the associated stochastic flow of diffeomorphisms focuses as fast as $ \mathrm{exp}(-2t\int_{R}\frac{m^2}{σ^2} dΠ)$, where $dΠ$ is the finite stationary measure. Moreover, if the drift is reversed and the diffeomorphism is inverted, then the path function so produced tends, independently of its starting point, to a single (random) point whose distribution is $dΠ$. Applications to stationary solutions of $X_t$, asymptotic behavior of solutions of SPDEs and random attractors are offered.

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Michele L. Baldini. 2004-12-20. On the invariant measure of a positive recurrent diffusion in R. https://arxiv.org/abs/math/0412410

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