Anita Kollwitz

Maximilian Nitzschner, Courant Institute New York: Bulk deviation lower bounds for the simple random walk (Oberseminar Mathematische Stochastik)

Wednesday, 18.01.2023 16:00 im Raum SRZ 216

Mathematik und Informatik

In this talk we present large deviation lower bounds for the probability of certain bulk-deviation events depending on the occupation-time field of a simple random walk on the Euclidean lattice in dimensions larger or equal to three. As a particular application, these bounds imply an exact leading order decay rate for the probability of the event that a simple random walk covers a substantial fraction of a macroscopic body, when combined with a corresponding upper bound previously obtained by Sznitman. As a pivotal tool for deriving such optimal lower bounds, we recall the model of tilted walks, which was first introduced by Li in order to develop similar large deviation lower bounds for the probability of disconnecting a macroscopic body from an enclosing box by the trace of a simple random walk, and discuss a refined local coupling with the model of random interlacements.

Angelegt am Friday, 16.12.2022 11:55 von Anita Kollwitz
Geändert am Tuesday, 10.01.2023 14:10 von Anita Kollwitz
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