论文标题
Quark-Gluon等离子体的运动粘度与粘度最小的液体之间的相似性
Similarity between the kinematic viscosity of quark-gluon plasma and liquids at the viscosity minimum
论文作者
论文摘要
最近，已经发现，可以根据基本的物理常数表示液体的运动粘度，最少$ν_m$，以$ 10^{ - 7}〜{\ rm m^2/s} $的订单$ν_m$。在这里，我们表明，夸克 - 格洛隆等离子体（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。鉴于QGP的动态粘度和密度比液体大约16个数量级，并且两个系统具有不同的相互作用和基本理论，因此相似性是惊人的。我们讨论了该结果对理解QGP的含义，包括在粘度最小的流动和粒子动力学的相似性，相关的动力交叉和剪切扩散率的普遍性。
Recently, it has been found that the kinematic viscosity of liquids at the minimum, $ν_m$, can be expressed in terms of fundamental physical constants, giving $ν_m$ 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.
