Strong rates of convergence of a splitting scheme for Schrödinger equations with nonlocal interaction cubic nonlinearity and white noise dispersion

Charles-Edouard Bréhier (1, 2) , David Cohen (3)

1 PSPM - Probabilités, statistique, physique mathématique
2 ICJ - Institut Camille Jordan
3 Chalmers - Department of Mathematical Sciences

We analyse a splitting integrator for the time discretization of the Schrödinger equation with nonlocal interaction cubic nonlinearity and white noise dispersion. We prove that this time integrator has order of convergence one in the p-th mean sense, for any $p\ge 1$ in some Sobolev spaces. We prove that the splitting schemes preserves the $L^2$-norm, which is a crucial property for the proof of the strong convergence result. Finally, numerical experiments illustrate the performance of the proposed numerical scheme.

Domaines: Probabilités [math.PR]; Analyse numérique [math.NA]

Charles-Edouard Bréhier, David Cohen. Strong rates of convergence of a splitting scheme for Schrödinger equations with nonlocal interaction cubic nonlinearity and white noise dispersion. SIAM/ASA Journal on Uncertainty Quantification, 2022, 10 (1), ⟨10.1137/20M1378168⟩. ⟨hal-02986230⟩