Correlational approach to the problem of separating a complex spectrum
โ Scribed by N. K. Nadirov; E. A. Manykin; S. M. Burkitbaev; A. B. Kenzhebaev
- Publisher
- Springer US
- Year
- 1986
- Tongue
- English
- Weight
- 444 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0021-9037
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๐ SIMILAR VOLUMES
## Abstract A variant of the transcorrelated method of Boys and Handy employing finite differences is presented. It is based upon the following two properties of the transcorrelated Hamiltonian operator __C__^โ1^__HC__: (1) __C__^โ1^__HC__ possesses an energy eigenvalue spectrum which is identical
A new finite-cluster method for the correlated electron problem has been applied to Hubbard and Heisenberg models and shown to yield accurate solutions for the ground-state and low-lying excited states of finite systems. Iterating this method results in much improved estimates of ground-state energy