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Open AccessArticle

Bulk Viscosity of Hot Quark Plasma from Non-Equilibrium Statistical Operator

1
Institute for Theoretical Physics, Goethe University, Max-von-Laue-Straße, 1, 60438 Frankfurt am Main, Germany
2
Frankfurt Institute for Advanced Studies, Ruth-Moufang-Straße, 1, 60438 Frankfurt am Main, Germany
*
Author to whom correspondence should be addressed.
Particles 2018, 1(1), 212-229; https://doi.org/10.3390/particles1010016
Received: 18 June 2018 / Revised: 23 July 2018 / Accepted: 13 August 2018 / Published: 20 August 2018
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Abstract

We provide a discussion of the bulk viscosity of two-flavor quark plasma, described by the Nambu–Jona-Lasinio model, within the framework of Kubo-Zubarev formalism. This discussion, which is complementary to our earlier study, contains a new, detailed derivation of the bulk viscosity in the case of multiple conserved charges. We also provide some numerical details of the computation of the bulk viscosity close to the Mott transition line, where the dissipation is dominated by decays of mesons into quarks and their inverse processes. We close with a summary of our current understanding of this quantity, which stresses the importance of loop resummation for obtaining the qualitatively correct result near the Mott line. View Full-Text
Keywords: transport coefficients; bulk viscosity; correlation functions; statistical operator transport coefficients; bulk viscosity; correlation functions; statistical operator
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Harutyunyan, A.; Sedrakian, A. Bulk Viscosity of Hot Quark Plasma from Non-Equilibrium Statistical Operator. Particles 2018, 1, 212-229.

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