English

Annealed limit for a diffusive disordered mean-field model with random jumps

Probability 2023-09-15 v4

Abstract

We study a sequence of NN-particle mean-field systems, each driven by NN simple point processes ZN,iZ^{N,i} in a random environment. Each ZN,iZ^{N,i} has the same intensity (f(XtN))t(f(X^N_{t-}))_t and at every jump time of ZN,i,Z^{N,i}, the process XNX^N does a jump of height Ui/NU_i/\sqrt{N} where the UiU_i are disordered centered random variables attached to each particle. We prove the convergence in distribution of XNX^N to some limit process Xˉ\bar X that is solution to an SDE with a random environment given by a Gaussian variable, with a convergence speed for the finite-dimensional distributions. This Gaussian variable is created by a CLT as the limit of the patial sums of the Ui.U_i. To prove this result, we use a coupling for the classical CLT relying on the result of [Koml\'os, Major and Tusn\'ady (1976)], that allows to compare the conditional distributions of XNX^N and Xˉ\bar X given the random environment, with the same Markovian technics as the ones used in [Erny, L\"ocherbach and Loukianova (2022)].

Keywords

Cite

@article{arxiv.2210.13128,
  title  = {Annealed limit for a diffusive disordered mean-field model with random jumps},
  author = {Xavier Erny},
  journal= {arXiv preprint arXiv:2210.13128},
  year   = {2023}
}

Comments

29 pages, 0 figure

R2 v1 2026-06-28T04:20:43.679Z