About this Physics and Astronomy article
A diagrammatic interpretation of formal Rayleigh—Schrödinger perturbation theory by Valdimír Kvasnička is a Physics and Astronomy article available to read on EtoBox.
A diagammatic,interprct~tion of the formal (i.e.; without second quantization ~ormalismj quasi-degenerate Rayleigh-Sciuiidinger perturbation theory with non-hem+ian model hamiltonian is suggested. fn this appro&. : the diagrammatic expressions for the Bloch wave operator U as well as for the model interaction operator GRS are obtained. in the framework of the suggested grapholofy it is pdssib!e to perform a detailed study of the aI.gebraic .' structure of individual perturbation contributions. The present diagram'matic approach has some general features of Brandow's folded-diagram method initially introduced in order to construct the many-body degenerate Rayleigh-' SchrGdinger pe~urbation theory.
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- Author
- Valdimír Kvasnička
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0009-2614)
- Published
- 1975
- Language
- EN
- Field
- Physics and Astronomy (Physical Sciences)