Perturbation theory within the variation method
β Scribed by Saul T. Epstein
- Book ID
- 104579047
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 189 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0020-7608
No coin nor oath required. For personal study only.
β¦ Synopsis
Abstract
Some of Moccia's formulas (Int. J. Quant. Chem. 8, 293 (1974)) for corrections to βnot completely optimized variational parametersβ are compared with those resulting from a perturbation theory analysis. It is not possible to choose the zeroβorder Hamiltonian (at least not in any simple way) so as to get exact agreement, but one choice does come close.
π SIMILAR VOLUMES
In this article we give a detailed discussion of the mass perturbation theory of the massive Schwinger model. After discussing some general features and briefly reviewing the exact solution of the massless case, we compute the vacuum energy density of the massive model and some related quantities. W
## Abstract Using the variational principle, equations have been obtained for density matrix of molecules with the external perturbation of the common type present. The perturbed wave function was taken as a superposition of the ground and singleβexcited configurations made of the HartreeβFock mole