Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential

Abstract

In this letter, based on Kubo's formula and the QCD low energy theorem, we propose a direct formula for calculating the bulk viscosity of QCD at finite chemical potential $\mu$ and zero temperature. According to this formula, the bulk viscosity at finite $\mu$ is totally determined by the dressed quark propagator at finite $\mu$. We then use a dynamical, confining Dyson-Schwinger equation model of QCD to calculate the bulk viscosity at finite $\mu$. It is found that no sharp peak behavior of the bulk viscosity at finite $\mu$ is observed, which is quite different from that of the bulk viscosity at finite temperature.

5 pages, 1 figure, 1 table

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Cited by in corpus (3)

• Bulk and shear viscosities of hot and dense hadron gas
• Estimating transport coefficients in hot and dense quark matter
• Transport in strongly coupled quark matter