A comparative study on two different expressions of Bulk viscosity in the PNJL model

Abstract

We have gone through a comparative study on two different kind of bulk viscosity expressions by using a common dynamical model. The Polyakov-Nambu-Jona-Lasinio (PNJL) model in the realm of mean-field approximation, including up to eight quark interactions for 2+1 flavor quark matter, is treated for this common dynamics. We have probed the numerical equivalence as well as discrepancy of two different expressions for bulk viscosity at vanishing quark chemical potential. Our estimation of bulk viscosity to entropy density ratio follows a decreasing trend with temperature, which is observed in most of the earlier investigations. We have also extended our estimation for finite values of quark chemical potential.

13 pages, 4 figures

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Cited by in corpus (8)

• Calculations of Shear, Bulk viscosities and Electrical conductivity in Polyakov-Quark-Meson model
• Transport coefficients in a finite volume Polyakov--Nambu--Jona-Lasinio model
• One-loop Kubo estimations of the shear and bulk viscous coefficients for hot and magnetized Bosonic and Fermionic systems
• Polyakov--Nambu--Jona-Lasinio model in finite volumes
• Finite size effect of hadronic matter on its transport coefficients
• Thermodynamics of strongly interacting matter in a hybrid model
• Phenomenological bound on the viscosity of the hadron resonance gas
• Bulk viscosity coefficient of hadronic matter