Cutoff for diffusions beyond nonnegative curvature

20.10.2025 16:00 - 17:00

Max Fathi (Université Paris Cité)

Abstract: The cutoff phenomenon is a widely observed property of sequences of large Markov chans, where the convergence to equilibrium becomes more abrupt as the system size grows. Recently, Justin Salez proved a characterization of when cutoff occurs for sequences of diffusion processes with non-negative curvature. I will present a few extensions of his method, covering some situations with negative curvature, as well as kinetic diffusion processes. Based on joint work with Arnaud Guillin, Cyril Labbé and Justin Salez.

Organiser:
M. Beiglböck, N. Berestycki, L. Erdös, J. Maas, F. Toninelli, E. Schertzer
Location:
EI 5 Hochenegg HS, TU Wien, Gußhausstraße 25-25a, 1040 Wien