Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum

Trachenko, Kostya; Brazhkin, Vadim; Baggioli, matteo

doi:10.21468/SciPostPhys.10.5.118

SciPost Physics

Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum

Kostya Trachenko, Vadim Brazhkin, Matteo Baggioli

SciPost Phys. 10, 118 (2021) · published 27 May 2021

doi: 10.21468/SciPostPhys.10.5.118
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Abstract

Recently, it has been found that the kinematic viscosity of liquids at the minimum, $\nu_m$, can be expressed in terms of fundamental physical constants, giving $\nu_m$ on the order of $10^{-7}~{\rm m^2/s}$. Here, we show that the kinematic viscosity of quark-gluon plasma (QGP) has a similar value and support this finding by experimental data and theoretical estimations. The similarity is striking, given that the dynamic viscosity and the density of QGP are about 16 orders of magnitude larger than in liquids and that the two systems have disparate interactions and fundamental theories. We discuss the implications of this result for understanding the QGP including the similarity of flow and particle dynamics at the viscosity minimum, the associated dynamical crossover and universality of shear diffusivity.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.10.5.118
TI  - Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum
PY  - 2021/05/27
UR  - https://scipost.org/SciPostPhys.10.5.118
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 10
IS  - 5
SP  - 118
A1  - Trachenko, Kostya
AU  - Brazhkin, Vadim
AU  - Baggioli, matteo
AB  - Recently, it has been found that the kinematic viscosity of liquids at the minimum, $\nu_m$, can be expressed in terms of fundamental physical constants, giving $\nu_m$ on the order of $10^{-7}~{\rm m^2/s}$. Here, we show that the kinematic viscosity of quark-gluon plasma (QGP) has a similar value and support this finding by experimental data and theoretical estimations. The similarity is striking, given that the dynamic viscosity and the density of QGP are about 16 orders of magnitude larger than in liquids and that the two systems have disparate interactions and fundamental theories. We discuss the implications of this result for understanding the QGP including the similarity of flow and particle dynamics at the viscosity minimum, the associated dynamical crossover and universality of shear diffusivity.
ER  -

@Article{10.21468/SciPostPhys.10.5.118,
	title={{Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum}},
	author={Kostya Trachenko and Vadim Brazhkin and Matteo Baggioli},
	journal={SciPost Phys.},
	volume={10},
	pages={118},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.10.5.118},
	url={https://scipost.org/10.21468/SciPostPhys.10.5.118},
}

Cited by 11

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¹ Kostya Trachenko,
² Vadim Brazhkin,
³ ⁴ matteo Baggioli

Funders for the research work leading to this publication

Engineering and Physical Sciences Research Council [EPSRC]
Ministerio de Economía y Competitividad (MINECO) (through Organization: Ministerio de Economía, Industria y Competitividad / Ministry of Economy, Industry and Competitiveness [MINECO])