Viscosity of the Scalar Fields from the Classical Theory

Details Viscosity of the Scalar Fields from the Classical Theory Viscosity of the Scalar Fields from the Classical Theory

1998-08-18

arxiv.org/abs/hep-ph/9808349v1

Phys.Lett. B446 (1999) 203-208

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, LaTeX, 1 eps figure

Scientific paper

10.1016/S0370-2693(98)01496-8

We show how the resummation for time dependent quantities at high temperature can be performed with an effective classical theory. As an application we demonstrate that the leading term in the shear viscosity, which is related to the $\rho_{\Phi^2\Phi^2}$ spectral function can be calculated classically, either using classical linear response theory or from the classical $\Phi^2$ correlation function. The classical result depends explicitly on the cutoff, and the choice $\Lambda\sim T$ reproduces the known quantum result.

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