Large deviations for intersection measures of some Markov processes

Takahiro Mori

Mathematische Nachrichten, 2020, vol. 293, issue 3, 533-553

Abstract: Consider an intersection measure ℓtIS of p independent (possibly different) m‐symmetric Hunt processes up to time t in a metric measure space E with a Radon measure m. We derive a Donsker–Varadhan type large deviation principle for the normalized intersection measure t−pℓtIS on the set of finite measures on E as t→∞, under the condition that t is smaller than life times of all processes. This extends earlier work by W. König and C. Mukherjee [16], in which the large deviation principle was established for the intersection measure of p independent N‐dimensional Brownian motions before exiting some bounded open set D⊂RN. We also obtain the asymptotic behavior of logarithmic moment generating function, which is related to the results of X. Chen and J. Rosen [7] on the intersection measure of independent Brownian motions or stable processes. Our results rely on assumptions about the heat kernels and the 1‐order resolvents of the processes, hence include rich examples. For example, the assumptions hold for p∈Z with 2≤p

Date: 2020
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https://doi.org/10.1002/mana.201800228

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