Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum
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 valu...
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| Format: | Article |
| Language: | English |
| Published: |
SciPost
2021-05-01
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| Series: | SciPost Physics |
| Online Access: | https://scipost.org/SciPostPhys.10.5.118 |
| Summary: | 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. |
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| ISSN: | 2542-4653 |