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New version of the Rayleigh–Schrödinger perturbation theory: Examples
Author(s) -
Kalhous Miloš,
Skála L.,
Zamastil J.,
Čížek J.
Publication year - 2004
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.20041
Subject(s) - perturbation (astronomy) , poincaré–lindstedt method , wave function , perturbation theory (quantum mechanics) , physics , quantum , rayleigh scattering , quantum mechanics , classical mechanics
It has been shown in our preceding papers that the linear dependence of the perturbation wave functions on the perturbation energies makes possible to calculate the exact perturbation energies from the values of the perturbation wave functions corresponding to arbitrarily chosen trial perturbation energies. The resulting version of the perturbation theory is very simple and can be used at large orders. In this paper, this method is applied to a few problems and its numerical properties are discussed. © 2004 Wiley Periodicals, Inc. Int J Quantum Chem, 2004