Timo Seppalainen, University of Wisconsin

Random walk in random environment and the Kardar-Parisi-Zhang class
Nov 29, 2017, 3:00 pm4:00 pm
214 - Fine Hall
Event Description

Abstract. This talk concerns a relationship between two much-studied classes of models of motion in a random medium, namely random walk in random environment (RWRE) and the Kardar-Parisi-Zhang (KPZ) universality class. Barraquand and Corwin discovered that in 1+1 dimensional RWRE in a dynamical beta environment the correction to the quenched large deviation principle obeys KPZ behavior. In this talk we condition the beta walk to escape at an atypical velocity and show that the resulting Doob-transformed RWRE obeys the KPZ wandering exponent 2/3. The logarithm of the harmonic function in the Doob transform obeys the KPZ 1/3 exponent. Based on joint work with M\'arton Bal\'azs (Bristol) and Firas Rassoul-Agha (Utah).

Event Category
Probability Seminar