Cluster Variation Method of Cooperative Phenomena and its Generalization II. Quantum Statistics
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概要
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The formulation of the cluster variation method of approximation for cooperative phenomena is generalized to the cases where the quantum statistics is to be taken into account. In this generalization, the nature of approximation becomes more obscure, but the quantum counterparts of the various approximations introduced in classical statistics are easily found. The method in its lowest approximation-the point approximation-is applied to the lattice model of liquid helium proposed by Matsubara and Matsuda and found to lead to the same results as they obtained under the consideration of the analogy to an anisotropic spin system.
- 社団法人日本物理学会の論文
- 1957-10-05
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