A Dual Path Integral Representation for Finite Temperature Quantum Field Theory

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

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LATEX, 26 pages, one figure

Scientific paper

10.1103/PhysRevD.77.105030

We impose the periodicity conditions corresponding to the Matsubara formalism for Thermal Field Theory as constraints in the imaginary time path integral. These constraints are introduced by means of time-independent auxiliary fields which, by integration of the original variables, become dynamical fields in the resulting `dual' representation for the theory. This alternative representation has the appealing property of involving fields which live in one dimension less than the original ones, with a quantum partition function whose integration measure is identical to the one of its classical counterpart, albeit with a different (spatially nonlocal) action.

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