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Number of results
1994 | 85 | 2 | 413-417
Article title

Effective Field Methods for Magnetic Systems

Content
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EN
Abstracts
EN
The self-consistency conditions inherent in the mean-field approximation are extended to take into account some pair correlations. Ii is shown that this extension is systematically improvable and applicable to the spin systems with short-range interactions in the entire temperature region. With two correlations included and the renormalization-group ideas implemented, the critical properties of the Ising model are satisfactorily revealed. Moreover, the improved estimates of the thermodynamical quantities for the quantum linear XY model from the finite-size calculations are found down to very low temperatures.
Keywords
Contributors
author
  • Institute of Theoretical Physics, KU Leuven, Belgium
author
  • Institute of Theoretical Physics, KU Leuven, Belgium
author
  • Institute of Physics, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv85z236kz
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