Eigenvalue distributions and Weyl laws for semi-classical non-self-adjoint operators in 2 dimensions

Details Eigenvalue distributions and Weyl laws for semi-classical non-self-adjoint operators in 2 dimensions Eigenvalue distributions and Weyl laws for semi-classical non-self-adjoint operators in 2 dimensions

2008-04-25

arxiv.org/abs/0804.4052v1

Mathematics

Spectral Theory

Scientific paper

In this note we compare two recent results about the distribution of eigenvalues for semi-classical pseudodifferential operators in two dimensions. For classes of analytic operators A. Melin and the author obtained a complex Bohr-Sommerfeld rule, showing that the eigenvalues are situated on a distorted lattice. On the other hand, with M. Hager we showed in any dimension that Weyl asymptotics holds with probability close to 1 for small random perturbations of the operator. In both cases the eigenvalues distribute to leading order according two smooth densities and we show here that the two densities are in general different.

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