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A strongly perturbed quantum system is a semiclassical system

Marco Frasca

hep-tharXiv:hep-th/0603182

Abstract

We show that a strongly perturbed quantum system, being a semiclassical system characterized by the Wigner-Kirkwood expansion for the propagator, has the same expansion for the eigenvalues as for the WKB series. The perturbation series is rederived by the duality principle in perturbation theory.

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