Concentration around a stable equilibrium for the non-autonomous $Φ_3^4$ model

Dimitri Faure

Published 2025-02-28, updated 2025-06-20Version 2

We consider time-dependent singular stochastic partial differential equations on the three-dimensional torus. These equations are only well-posed after one adds renormalization terms. In order to construct a well-defined notion of solution, one should put the equation in a more general setting. In this article, we consider the paradigm of paracontrolled distributions, and get concentration results around a stable deterministic equilibrium for solutions of non-autonomous generalizations of the $(\Phi_3^4)$ model. Specifically, we obtain Gaussian-type tail bounds.