Spectral function at high temperature

Abstract

For a weakly coupled quantum field at high temperature the classical approximation offers a possibility to gain insight into nonperturbative real-time dynamics. I use this to present a nonperturbative approach to the computation of spectral functions in real time. Results are shown for a scalar field in 2+1 dimensions.

Comments: Lattice2001(hightemp), 3 pages with 3 eps figures