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Thermodynamics of the ϕ4 theory in tadpole approximation

A. Peshier, B. Kämpfer, O. P. Pavlenko, G. Soff

hep-pharXiv:hep-ph/9801344

Abstract

Relying on the Luttinger-Ward theorem we derive a thermodynamically selfconsistent and scale independent approximation of the thermodynamic potential for the scalar ϕ4 theory in the tadpole approximation. The resulting thermodynamic potential as a function of the temperature is similar to the one of the recently proposed screened perturbation theory.

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