Bulk viscosity of hot dense Quark matter in the PNJL model

2013/06/17 by Shi-Song Xiao, Shisong Xiao, Le Zhang +3
Physics and Astronomy · #Condensed matter physics #Entropy (arrow of time) #Equation of state #High-Energy Particle Collisions Research #Kubo formula #Particle physics #Phase transition #Physics #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Strange matter #Thermodynamics #Viscosity #Volume viscosity #hep-ph #nucl-th

paper · pdf · doi:10.1088/1674-1137/38/5/054101

8 Pages, 3 figures in Latex. arXiv admin note: text overlap with arXiv:1107.5113 by other authors

arxiv created 2013/06/17 · openalex publication_date 2014/05/01 · arxiv updated 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Starting from the Kubo formula and the QCD low energy theorem, we study the the bulk viscosity of hot dense quark matter in the PNJL model from the equation of state. We show that the bulk viscosity has a sharp peak near the chiral phase transition, and that the ratio of bulk viscosity over entropy rises dramatically in the vicinity of the phase transition. These results agree with those from the lattice and other model calculations. In addition, we show that the increase of chemical potential raises the bulk viscosity.

Citations

• Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential
• Bulk viscosity of strange quark matter: Urca versus nonleptonic processes
• How parameters and regularization affect the Polyakov–Nambu–Jona-Lasinio model phase diagram and thermodynamic quantities
• Thermodynamic properties and bulk viscosity near phase transition in theZ(2)andO(4)models
• QCD equation of state with almost physical quark masses
• Polyakov loop, diquarks, and the two-flavor phase diagram