A strongly perturbed quantum system is a semiclassical system

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.

4 pages, no figures. Accepted for publication in Proceedings of the Royal Society A

References in corpus (2)

• A modern review of the two-level approximation
• 1/N-expansion for the Dicke model and the decoherence program

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