Soliton dynamics for the Korteweg-de Vries equation with multiplicative homogeneous noise

Details Soliton dynamics for the Korteweg-de Vries equation with multiplicative homogeneous noise Soliton dynamics for the Korteweg-de Vries equation with multiplicative homogeneous noise

2009-01-14

arxiv.org/abs/0901.1965v1

Mathematics

Analysis of PDEs

Scientific paper

We consider a randomly perturbed Korteweg-de Vries equation. The perturbation is a random potential depending both on space and time, with a white noise behavior in time, and a regular, but stationary behavior in space. We investigate the dynamics of the soliton of the KdV equation in the presence of this random perturbation, assuming that the amplitude of the perturbation is small. We estimate precisely the exit time of the perturbed solution from a neighborhood of the modulated soliton, and we obtain the modulation equations for the soliton parameters. We moreover prove a central limit theorem for the dispersive part of the solution, and investigate the asymptotic behavior in time of the limit process.

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