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Improvement of the grand canonical quantum Monte Carlo method at low temperatures

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Zeitschrift für Physik B Condensed Matter

Abstract

We introduce an improvement of the algorithm for the simulation of correlated fermi systems in the grand canonical ensemble. Using this new method the computer time grows no more with the square but essentially linearly with the inverse temperature. At low temperatures the number of operations is diminished by a factor typically between 5 and 20. We present results for correlation functions of the one-dimensional Hubbard model at various band fillings.

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Authors and Affiliations

  1. Institut für Festkörperforschung, KFA Jülich, W-5170, Jülich, Federal Republic of Germany

    M. Ulmke & H. Müller-Krumbhaar

Authors
  1. M. Ulmke
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  2. H. Müller-Krumbhaar
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Ulmke, M., Müller-Krumbhaar, H. Improvement of the grand canonical quantum Monte Carlo method at low temperatures. Z. Physik B - Condensed Matter 86, 383–387 (1992). https://doi.org/10.1007/BF01323731

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  • DOI: https://doi.org/10.1007/BF01323731

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