| Revista: | Brazilian journal of physics |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000376092 |
| ISSN: | 0103-9733 |
| Autores: | Akande, A1 |
| Instituciones: | 1Trinity College Dublin, School of Physics, Dublín. Irlanda |
| Año: | 2014 |
| Periodo: | Jun |
| Volumen: | 44 |
| Número: | 2-3 |
| Paginación: | 215-218 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | A dimensional scaling computation of the electron concentration-dependent ground-state energy for the repulsive Hubbard model is presented, a generalization of Capelle’s analysis of the 2D and 3D Hubbard Hamiltonians with half-filled bands. The computed ground-state energies are compared with the results of mean-field and density-matrix functional theories and of quantum Monte Carlo calculations. The comparison indicates that dimensional scaling yields moderately accurate ground-state energies close to and at half filling over the wide range of interaction strengths in the study. By contrast, the accuracy becomes poor at low filling for strong interactions |
| Disciplinas: | Física y astronomía |
| Palabras clave: | Física de materia condensada, Modelo de Hubbard, Energía de estado basal, Escalamiento dimensional |
| Keyword: | Physics and astronomy, Condensed matter physics, Hubbard model, Ground-state energy, Dimensional scaling |
| Texto completo: | Texto completo (Ver HTML) |
