Asymptotics of the overlap distribution of branching Brownian motion at high temperature
Abstract
At high temperature, the overlap of two particles chosen independently according to the Gibbs measure of the branching Brownian motion converges to zero as time goes to infinity. We investigate the precise decay rate of the probability to obtain an overlap greater than a , for some a > 0 , in the whole subcritical phase of inverse temperatures β ∈ [ 0 , β c ) . Moreover, we study this probability both conditionally on the branching Brownian motion and non-conditionally. Two sub-phases of inverse temperatures appear, but surprisingly the threshold is not the same in both cases.
Fields of Study & Subjects
Stochastic processes and statistical mechanics
Advanced Thermodynamics and Statistical Mechanics
Theoretical and Computational Physics
Publication details
- Journal / source
- Annales Henri Lebesgue
- Volume
- 9
- Pages
- 371–421
- Publication date
- 12 June 2026
- Language
- EN