 1114 Sandro Graffi, Thierry Paul
 Convergence of a quantum normal form and an exact quantization formula
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Feb 4, 11

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Abstract. We consider the Schr\"odinger operator defined by the quantization of the linear flow of diophantine frequencies over the ldimensional torus, perturbed by a holomorphic potential which depends on the actions only through their particular linear combination defining the Hamiltonian of the linear flow.
We prove that the corresponding quantum normal form converges uniformly with respect to the Planck constant. This result simultaneously yields an exact quantization formula for the quantum spectrum,
as well as a convergence criterion for the Birkhoff normal form, valid
for a class of perturbations holomorphic away from the origin.
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