A calculation of the bulk viscosity in SU(3) gluodynamics

2007/10/19 by Harvey B. Meyer · 2 citations
Physics and Astronomy · #hep-lat #hep-ph #nucl-th

paper · pdf · doi:10.1103/physrevlett.100.162001

published as Phys.Rev.Lett.100:162001,2008 · 4 pages, 4 figures

arxiv created 2007/10/19 · arxiv updated 2009/12/01

Abstract

We perform a lattice Monte-Carlo calculation of the trace-anomaly two-point function at finite temperature in the SU(3) gauge theory. We obtain the long-distance properties of the correlator in the continuum limit and extract the bulk viscosity zeta via a Kubo formula. Unlike the tensor correlator relevant to the shear viscosity, the scalar correlator depends strongly on temperature. If s is the entropy density, we find that zeta/s becomes rapidly small at high T, zeta/s<0.15 at 1.65T_c and zeta/s<0.015 at 3.2T_c. However zeta/s rises dramatically just above T_c, with 0.5<zeta/s<2.0 at 1.02T_c.

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