Influence of additive white noise forcing on solutions of mixed nls equations.

In this paper, ihe influence of an additive white noise forcing term on ihe numerical solution for a class of deierminisiic nonlinear one-dimensional Schrödinger equaiions wiih mixed concave convex was studied, sub-super nonlinearities, that is, the stationary states and the blowing-up solutions. Such a perturbation occurs when the size of the noise, described by the real-value parameter e is positive. The size of the noise is controlled by the parameter e >0. We also proved that as e approaches zero, the solution of the perturbed problem converges to the unique trajectory of the deterministic equation, which is the solitary wave. The stochastic model appears to be more realistic, and one can observe, for small values of e, a similar evolution phenomena about the solution as that given by the deterministic case. However, an explosion of the solution and a blow-up phenomena can be noted as e becomes bigger. [ABSTRACT FROM AUTHOR]