Phys. Rev. A 56, 4304–4306 (1997)Renormalized perturbation theory by the moment method for degenerate statesReceived 9 September 1996; revised 14 May 1997; published in the issue dated November 1997 We apply renormalized perturbation theory by the moment method to an anharmonic oscillator in two dimensions with a perturbation that couples unperturbed degenerate states. The method leads to simple recurrence relations for the perturbation corrections to the energy and moments of the eigenfunction. We generalize the approach and systematize its application to excited states. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.56.4304
DOI:
10.1103/PhysRevA.56.4304
PACS:
03.65.Ge
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.