Asymptotic R\'enyi Entropies of Random Walks on Groups
Speaker:
Omer Tamuz, California Institute of Technology
Date and Time:
Thursday, May 16, 2024 - 9:30am to 10:30am
Location:
The Fields Institute, Room 230
Abstract:
With Kimberly Golubeva and Minghao Pan
We introduce asymptotic Renyi entropies as a parameterized family of invariants for random walks on groups. These invariants interpolate between various well-studied properties of the random walk, including the growth rate of the group, the Shannon entropy, and the spectral radius. They furthermore offer large deviation counterparts of the Shannon-McMillan-Breiman Theorem. We prove some basic properties of asymptotic Renyi entropies that apply to all groups, and discuss their analyticity and positivity for the free group and lamplighter groups.