Cube cluster approximation for the spin
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Sumiyoshi Fujiki; Yoshihiko Abe; Shigetoshi Katsura
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Article
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1982
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Elsevier Science
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English
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The spin glass in the random-bond Ising model on a simple cubic lattice is considered. A simple method to calculate the partial trace of the density matrices of a fairly large cluster by use of the REDUCE system is presented. The phase diagram showing the paramagnetic, ferromagnetic, antiferromagnet