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On high-temperature expansions of the Hubbard model

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Zeitschrift für Physik B Condensed Matter

Abstract

We discuss the application of the high-temperature expansion method to the Hubbard model. We recalculate the expansion series of the susceptibility up to the sixth order in the transfer matrix element,t, in the strong correlation limit, and up to the fourth order int in case that the repulsive potential,U, is finite, butt/U ≪ 1. It is seen that the convergence of the series is very poor.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Ruhr-Universität Bochum, Universitätsstraße 150, D-4630, Bochum-Querenburg, Germany

    W. Brauneck

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  1. W. Brauneck
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Brauneck, W. On high-temperature expansions of the Hubbard model. Z Physik B 28, 291–296 (1977). https://doi.org/10.1007/BF01317256

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  • DOI: https://doi.org/10.1007/BF01317256

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