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单词 High temperature expansion
释义

High temperature expansion

英语百科

Cluster expansion

(重定向自High temperature expansion)

In statistical mechanics, the cluster expansion (also called the high temperature expansion or hopping expansion) is a power series expansion of the partition function of a statistical field theory around a model that is a union of non-interacting 0-dimensional field theories. Cluster expansions originated in the work of Mayer & Montroll (1941). Unlike the usual perturbation expansion, it converges in some non-trivial regions, in particular when the interaction is small.

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