The stochastic nonlocal Cahn–Hilliard equation with regular potential and multiplicative noise

Abstract In this work, we deal with the stochastic counterpart of the nonlocal Cahn–Hilliard equation with regular potential in a smooth bounded one-, two- or three-dimensional domain. The problem is endowed with homogeneous Neumann boundary conditions and random initial data. Furthermore, the system is driven by cylindrical noise of multiplicative type. For the resulting system, we are able to show the existence of probabilistically-weak (or martingale) solutions in two and three dimensions, that are unique and probabilistically-strong under suitable assumptions on the stochastic diffusion. Moreover, we investigate the nonlocal-to-local asymptotics toward solutions of the local stochastic Cahn–Hilliard equations, establishing, under regularity conditions, a precise rate of convergence as well.