A P ] 1 2 Ju l 2 00 4 Long range scattering for the Wave-Schrödinger system with large wave data and small Schrödinger data

We study the theory of scattering for the Wave-Schrödinger system with Yukawa type coupling in space dimension 3. We prove in particular the existence of modified wave operators for that system with no size restriction on the wave data in the framework of a direct method which requires smallness of the Schrödinger data, and we determine the asymptotic behaviour in time of solutions in the range of the wave operators.

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