The rate of decay of the Wiener sausage in local Dirichlet space

2010/07/28 by Lee R. Gibson, Gibson, Lee R., Melanie Pivarski +1
Mathematics · #60J60 (Primary) 58J65 (Secondary) #FOS: Mathematics #Probability (math.PR) #math.PR #msc:58J65 #msc:60J60

paper · pdf · doi:10.48550/arxiv.1007.4987

12 pages

arxiv created 2010/07/28 · arxiv updated 2010/07/29

Abstract

In the context of a heat kernel diffusion which admits a Gaussian type estimate with parameter beta on a local Dirichlet space, we consider the log asymptotic behavior of the negative exponential moments of the Wiener sausage. We show that the log asymptotic behavior up to time t^betaV(x,t) is V(x,t), which is analogous to the Euclidean result. Here V(x,t) represents the mass of the ball of radius t about a point x of the local Dirichlet space. The proof uses a known coarse graining technique to obtain the upper asymptotic, but must be adapted to for use without translation invariance in this setting. This result provides the first such asymptotics for several other contexts, including diffusions on complete Riemannian manifolds with non-negative Ricci curvature.

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