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

by Matteo Baggioli, Vadim Brazhkin, Kostya Trachenko

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Submission summary

Authors (as registered SciPost users): Matteo Baggioli
Submission information
Preprint Link: https://arxiv.org/abs/2003.13506v3  (pdf)
Date accepted: 2021-05-17
Date submitted: 2021-04-25 03:12
Submitted by: Baggioli, Matteo
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
Specialties:
  • High-Energy Physics - Theory
Approach: Theoretical

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.

Published as SciPost Phys. 10, 118 (2021)




Reports on this Submission

Anonymous Report 2 on 2021-5-10 (Invited Report)

Report

The authors have addressed my concerns. The manuscript is now suitable for publication.

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Report 1 by Aninda Sinha on 2021-4-26 (Invited Report)

Report

The authors have now addressed my criticisms to the best that they can and have put in the required caveats. I recommend publishing this version.

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