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.

中文翻译：

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夸克胶子血浆的运动粘度与液体在最小粘度下的相似性

最近，发现最小的液体运动粘度$ \ nu_m $可以用基本物理常数表示，得出$ \ nu_m $约为$ 10 ^ {-7}〜{\ rm m ^ 2 / s} $。在这里，我们表明夸克-胶子等离子体（QGP）的运动粘度具有相似的值，并通过实验数据和理论估计来支持这一发现。考虑到QGP的动态粘度和密度比液体大约16个数量级，并且两个系统具有完全不同的相互作用和基本理论，因此相似性非常惊人。我们讨论了此结果对于理解QGP的含义，包括在最小粘度下的流动和颗粒动力学相似性，相关的动力学交叉和剪切扩散系数的普遍性。