It is possible to calculate the ground-state wave function and energy of a periodic solid by applying quantum chemical methods. The accuracy achieved is comparable with that for small molecules. The many-body problem of the correlated ground state is expressed in terms of cumulant scattering matrice
Improvement to wave functions and energy values of the ground state of helium
β Scribed by Radi, H. M. A.
- Book ID
- 118210404
- Publisher
- The American Physical Society
- Year
- 1975
- Tongue
- English
- Weight
- 376 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1050-2947
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π SIMILAR VOLUMES
A comparison is presented for the ground state of the helium atom of high order Rayleigh-Schri)dinger perturbation theories based upon a hydrogenic. a screened hydrogenic, a Hartree and a modified Hartree local zero-order hamiltonian. The hydrogenic zero-order schemes are superior tc the Hartree zer
## Abstract It is shown that trial functions involving PadΓ© approximants yield satisfactory results for the ground state of the helium atom. In particular, the fiveβparameter form reproduces the best variational function of the type Ξ¨ = __e__^__βzs__^Ο(__u__) obtained numerically, to a remarkable e