Convergence to SPDE of the Schrodinger equation with large, random potential

Abstract

We study the asymptotic behavior of solutions to the Schr{ö}dinger equation with large-amplitude, highly oscillatory, random potential. In dimension $d<\mathfrak{m}$, where $\mathfrak{m}$ is the order of the leading operator in the Schrödinger equation, we construct the heterogeneous solution by using a Duhamel expansion and prove that it converges in distribution, as the correlation length $\varepsilon$ goes to 0, to the solution of a stochastic differential equation, whose solution is represented as a sum of iterated Stratonovich integral, over the space $C([0,+\infty),\mathcal{S}')$. The uniqueness of the limiting solution in a dense space of $L^2(Ω\times\mathbb{R}^d)$ is shown by verifying the property of conservation of mass for the Schrödinger equation. In dimension $d>\mathfrak{m}$, the solution to the Schr{ö}dinger equation is shown to converge in $L^2(Ω\times\mathbb{R}^d)$ to a deterministic Schr{ö}dinger solution in \cite{ZB-12}.