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arXiv · 1911.03693

Polynomial rate of convergence to the Yaglom limit for Brownian motion with drift

William Oçafrain
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Abstract

This paper deals with the rate of convergence in 1-Wasserstein distance of the marginal law of a Brownian motion with drift conditioned not to have reached 0 towards the Yaglom limit of the process. In particular it is shown that, for a wide class of initial measures including Dirac measures and probability measures with compact support, the Wasserstein distance decays asymptotically as 1/t. Likewise, this speed of convergence is recovered for the convergence of marginal laws conditioned not to be absorbed up to a horizon time towards the Bessel-$3$ process, when the horizon time tends to infinity.

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William Oçafrain. 2019-11-09. Polynomial rate of convergence to the Yaglom limit for Brownian motion with drift. https://arxiv.org/abs/1911.03693

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