Structure of the Semi-Classical Amplitude for General Scattering Relations

Details Structure of the Semi-Classical Amplitude for General Scattering Relations Structure of the Semi-Classical Amplitude for General Scattering Relations

2004-07-28

arxiv.org/abs/math/0407502v1

Mathematics

Analysis of PDEs

29 pages; 2 figures

Scientific paper

We consider scattering by general compactly supported semi-classical perturbations of the Euclidean Laplace-Beltrami operator. We show that if the suitably cut-off resolvent of the Hamiltonian quantizes a Lagrangian relation on the product cotangent bundle, the scattering amplitude quantizes the natural scattering relation. In the case when the resolvent is tempered, which is true under some non-resonance assumptions, and when we work microlocally near a non-trapped ray, our result implies that the scattering amplitude defines a semiclassical Fourier integral operator associated to the scattering relation in a neighborhood of that ray. Compared to previous work we allow this relation to have more general geometric structure.

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