Non-perturbative ground-state of a generalized Hubbard model |
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Authors: | Oracio Navarro |
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Affiliation: | 1.Instituto de Investigationes en Materiales,UNAM,México,México |
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Abstract: | A generalized Hubbard model with on-site interactionU, inter-site interactionV, and general correlated hopping is studied using a mapping method. An exact solution of the problem of one hole and one doublyoccupied site moving in a ferromagnetic spin background is obtained. The mapping method used is based on mapping the original many-body problem onto an equivalent tight-binding one with impurities in a higher dimensional space. |
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