Abstract
An improved version of a cluster-effective-field theory for spin glasses, namely the double-cluster approximation, is formulated. The present version is based not on theself-consistency condition, but on thedouble-cluster-consistency condition. The advantages of the approximation combined with the coherentanomaly method are discussed. The critical data of the spin-glass susceptibility are estimated for the two-, three-, and four-dimensional ±J models.
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Hatano, N., Suzuki, M. Effective-field theory of spin glasses and the coherent-anomaly method. II. Double-Cluster approximation. J Stat Phys 66, 897–911 (1992). https://doi.org/10.1007/BF01055708
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DOI: https://doi.org/10.1007/BF01055708