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.
Cited by 13
Authors / Affiliations: mappings to Contributors and Organizations
See all Organizations.- 1 Kostya Trachenko,
- 2 Vadim Brazhkin,
- 3 4 matteo Baggioli
- 1 Queen Mary University of London [QMUL]
- 2 Институт физики высоких давлений имени / Institute for High Pressure Physics [HPPI RAS]
- 3 Universidad Autónoma de Madrid / Autonomous University of Madrid [UAM]
- 4 Instituto de Física Teórica / Institute for Theoretical Physics [IFT]
- 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])