Time Dependent Effective Actions at Finite Temperature

Abstract

I study derivative expansions of effective actions at finite temperature, illustrating how the standard methods are badly defined at finite temperature. I then show that by setting up the initial conditions at a finite time, these problems are solved.

Comments: 7 pages, LaTeX2e, poster presented at Strong and Electro-Weak Matter (SEWM 2000) Marseille, 15th June 2000