Semiclassical measure for the solution of the dissipative Helmholtz equation

Details Semiclassical measure for the solution of the dissipative Helmholtz equation Semiclassical measure for the solution of the dissipative Helmholtz equation

2009-11-23

arxiv.org/abs/0911.4362v1

Physics

Mathematical Physics

Scientific paper

We study the semiclassical measures for the solution of a dissipative Helmholtz equation with a source term concentrated on a bounded submanifold. The potential is not assumed to be non-trapping, but trapped trajectories have to go through the region where the absorption coefficient is positive. In that case, the solution is microlocally written around any point away from the source as a sum (finite or infinite) of lagragian distributions. Moreover we prove and use the fact that the outgoing solution of the dissipative Helmholtz equation is microlocally zero in the incoming region.

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