Document Type

Article

Publication Version

Published Version

Publication Date

2008

Journal or Book Title

Journal of High Energy Physics

Volume

2008

Issue

9

First Page

093

DOI

10.1088/1126-6708/2008/09/093

Abstract

Kubo's formula relates bulk viscosity to the retarded Green's function of the trace of the energy-momentum tensor. Using low energy theorems of QCD for the latter we derive the formula which relates the bulk viscosity to the energy density and pressure of hot matter. We then employ the available lattice QCD data to extract the bulk viscosity as a function of temperature. We find that close to the deconfinement temperature bulk viscosity becomes large, with viscosity-to-entropy ratio ζ/s ∼ 1.

Comments

This article is from Journal of High Energy Physics 2008 (2008): 093, doi: 10.1088/1126-6708/2008/09/093. Posted with permission.

Rights

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Copyright Owner

SISSA

Language

en

File Format

application/pdf

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