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Título: | Self-consistent random phase approximation: Application to the Hubbard model for finite number of sites |
Autor: | Jemaï, M.; Schuck, P.; Dukelsky, Jorge CSIC ORCID; Bennaceur, R. | Fecha de publicación: | 22-feb-2005 | Editor: | American Physical Society | Citación: | Physical Review B - Condensed Matter and Materials Physics 71: 085115-1-085115-15 (2005) | Resumen: | Within the one-dimensional Hubbard model linear closed chains with various numbers of sites are considered in the self-consistent random phase approximation (SCRPA). Excellent results with a minimal numerical effort are obtained for (2+4n)-site cases, confirming earlier results with this theory for other models. However, the 4n-site cases need further consideration. The SCRPA solves the two-site problem exactly. It therefore contains the two-electron and high-density Fermi gas limits correctly. ©2005 The American Physical Society. | Descripción: | 15 págs.; 17 figs.; 1 tab.; 2 apéndices ; PACS number (s): 75.10.Jm, 72.15.Nj | Versión del editor: | https://doi.org/10.1103/PhysRevB.71.085115 | URI: | http://hdl.handle.net/10261/140594 | DOI: | 10.1103/PhysRevB.71.085115 | Identificadores: | doi: 10.1103/PhysRevB.71.085115 issn: 1098-0121 |
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