Recovering asymptotics of metrics from fixed energy scattering data

Details Recovering asymptotics of metrics from fixed energy scattering data Recovering asymptotics of metrics from fixed energy scattering data

1997-10-31

arxiv.org/abs/math/9710221v1

Mathematics

Analysis of PDEs

Scientific paper

The problem of recovering the asymptotics of a short range perturbation of the Euclidean metric on R^n from fixed energy scattering data is studied. It is shown that if two such metrics, g1, g2, have scattering data at some fixed energy which are equal up to smoothing, then there exists a diffeomorphism \psi `fixing infinity' such that \psi^*(g1) - g2 is rapidly decreasing. Given the scattering matrix at two energies, it is shown that the asymptotics of a metric and a short range potential can be determined simultaneously. These results also hold for a wide class of scattering manifolds.

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