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Transport coefficients, spectral functions and the lattice

Gert Aarts1 and Jose María Martínez Resco1

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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

Thermal Field Theory

Lattice Quantum Field Theory

PACS

11.15.Ha Lattice gauge theory

11.10.-z Field theory

11.15.Tk Other nonperturbative techniques

Subjects

Particle physics and field theory

Dates

Issue 04 (April 2002)

Received 21 March 2002, accepted for publication 29 April 2002

Published 13 May 2002



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