Analytical Results for the Grand-Canonical Partition Function for Unidimensional Hubbard Model up to Order $β^5$

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We calculate the exact analytical coefficients of the $β$ expansion of the grand-canonical partition function of the unidimensional Hubbard model up to order $β^5$, using an alternative method, based on properties of the Grassmann algebra. The results derived are non-perturbative and no restrictions on the set of parameters that characterize the model are required. By applying this method we obtain analytical results for the thermodynamical quantities, in the high-temeprature limit, for arbitrary density of electrons in the unidimensional chain.
Plin TeX, 30 pages, 7 Encapsulated PostScript figures (uses epsf and rotate)

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Strongly Correlated Electrons, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/151801

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9705241
 http://arxiv.org/abs/cond-mat/9705241

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arXiv