Published by Institute of Physics Publishing for SISSA/ISAS
Received: March 21, 2002
Revised: April 25, 2002
Accepted: April 29, 2002
Transport coefficients, spectral functions and the
Gert Aarts and Jose MarŽia MartŽinez Resco
Department of Physics, The Ohio State University
174 West 18th Avenue, Columbus, OH 43210, USA
Email: email@example.com, firstname.lastname@example.org
Abstract: Transport coefficients are determined by the slope of spectral functions of
composite operators at zero frequency. We study the spectral function relevant for the
shear viscosity for arbitrary frequencies in weakly-coupled scalar and nonabelian gauge
theories at high temperature and compute the corresponding correlator in euclidean time.
We discuss whether nonperturbative values of transport coefficients can be extracted from
euclidean lattice simulations.
Keywords: Lattice Quantum Field Theory, Thermal Field Theory.
c SISSA/ISAS 2002 http://jhep.sissa.it/archive/papers/jhep042002053/jhep042002053.pdf