A supersymmetric mean-field approach to the infinite-U Hubbard model

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A generalized supersymmetric representation of the Hubbard operator algebra is considered. This representation is applied to the infinite-U Hubbard model. A mean-field theory which takes into account both on-site and inter-site virtual boson-fermion transitions is developed. Unlike previous approaches, the mean-field theory considered is free from divergences. Possible application of these results to the ferromagnet-paramagnet transition, as well as to other problems is discussed.
RevTeX, 12 pages

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/16808

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0009319
 http://arxiv.org/abs/cond-mat/0009319

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arXiv