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Partition function for the eigenvalues of the Wilson line

A. Gocksch, R. D. Pisarski

hep-pharXiv:hep-ph/9302233

Abstract

In a gauge theory at nonzero temperature the eigenvalues of the Wilson line form a set of gauge invariant observables. By constructing the corresponding partition function for the phases of these eigenvalues, we prove that the trivial vacuum, where the phases vanish, is a minimum of the free energy.

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