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.
Proceedings of the Royal Society of London Series A
- Pub Date:
- September 2007
- High Energy Physics - Theory;
- Mathematical Physics;
- Quantum Physics
- 4 pages, no figures. Accepted for publication in Proceedings of the Royal Society A