Interchange Theorems in Degenerate Perturbation Theory
- 1 November 1968
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 49 (9) , 3895-3898
- https://doi.org/10.1063/1.1670696
Abstract
We derive the equivalent of Dalgarno's interchange theorems for the case of exact or near degeneracy using Van Vleck perturbation theory. The application to excited states and to calculations based on our “distinguishable electron” method is discussed.Keywords
This publication has 6 references indexed in Scilit:
- Variational Form of Van Vleck Degenerate Perturbation Theory with Particular Application to Electronic Structure ProblemsThe Journal of Chemical Physics, 1968
- The distinguishable electron method for electronic structure calculationsChemical Physics Letters, 1968
- Bare-Nucleus Perturbation Theory: Excited States of Hydrogen MoleculeThe Journal of Chemical Physics, 1968
- On the Variation—Perturbation Method for Excited StatesThe Journal of Chemical Physics, 1966
- Recent Developments in Perturbation TheoryPublished by Elsevier ,1964
- A perturbation calculation of properties of the helium iso-electronic sequenceProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1958