Published December 1996
| Version v1
Journal article
Numerical results for generalized resonating-valence-bond wave functions: Application to the Hubbard model
Creators
- 1. Dipartimento di Fisica, Universita di Bologna, Via Irnerio 46, 40126 Bologna (Italy)
Description
Numerical results are presented for a generalized resonance-valence-bond state which includes both ionic and covalent contributions in each bond; non-nearest-neighbor bonds are also considered. Variational calculations have been performed and the space-group symmetry has been taken into account. The results for the Hubbard Hamiltonian are compared with the exact ones for the 2x2x2 and the 4x4 lattices. The agreement is quite satisfactory for large values of the interaction U (for U=40 the overlap with the exact ground-state wave function is 0.999). Several correlation functions are also compared. copyright 1996 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter
- Journal Volume
- 54
- Journal Issue
- 24
- Journal Page Range
- p. 17557-17563.
- ISSN
- 0163-1829
- CODEN
- PRBMDO
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 28020543
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- CHEMICAL BONDS; ELECTRON CORRELATION; GROUND STATES; HIGH-TC SUPERCONDUCTORS; HUBBARD MODEL; VARIATIONAL METHODS; WAVE FUNCTIONS
- Descriptors DEC
- CALCULATION METHODS; CORRELATIONS; CRYSTAL MODELS; ENERGY LEVELS; FUNCTIONS; MATHEMATICAL MODELS; SUPERCONDUCTORS