The Feynman rules of non-Abelian gauge theory at finite temperature are studied in a real-time formulation of quantum field theory at finite temperature. In order to have a simple prescription to obtain the Feynman rules at finite temperatures, an equivalence theorem which is a straightforward generalization of the same theorem at zero temperature to finite temperature will be presented in perturbation theory.

• Received 17 March 1983

DOI:https://doi.org/10.1103/PhysRevD.28.1931