Application of rayleigh-schrödinger perturbation theory to calculation of excitation energies
✍ Scribed by V. Kvasnička; A. Holubec; I. Hubač
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 419 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Rayleigh-Schr6dinger variational pertxhation theory is applied to the hydrogen-like atom with a perturbation proportional to l/r. It is r&orousIy shown &t the e.xact eigenfunction is obtained by direct summation of the perturbation ezqansion through infinite order.
A set of non-lmear cqustlons LS given winch solves the stationary Schrodmgcr equalion III terms of a known subproblem. An ItemlIve solution of the equations ylclds the degenerate version of Raylegh-SchrBdmgcr perturbation theory, but olhcr approxunatlon schemes, as well as a purely numerIca solullon
The ionization potentials and electron affinities are calculated by the use of the many-body Rayleigh-SchrBdinger perturbation theory. This approach is elaborated up to the third order, where each perturbation contribution can be interpreted by the diagrammatic method. Some simple illustrative calcu
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
A Rayleigh-Schrödinger perturbation theory approach based on the adiabatic (Born-Oppenheimer) separation of vibrational motions was previously developed and used to evaluate for a system of coupled oscillators the adiabatic energy levels and their nonadiabatic corrections. This method is applied her