标题： 流体动力化与重整化的粘性流体动力学 显示英文标题

标题： Hydrodynamization and resummed viscous hydrodynamics

摘要： 在这篇贡献章节中，我回顾了我们目前对流体力学应用于建模夸克胶子等离子体（QGP）的理解，重点讨论了QGP的流体动力化/热化问题以及非平衡态流体力学框架下的各向异性流体力学（aHydro）。 我讨论了远离平衡态流体力学吸引子的存在性以及在不同流体力学框架内确定吸引子的方法。 我还讨论了通过松弛时间近似下的Boltzmann方程精确解和应用于量子色动力学的有效运动学场论来确定吸引子的方法。 然后，我展示了动能吸引子与标准二粘性流体力学框架及各向异性流体力学所得吸引子的比较结果。 我证明，由于在逆雷诺数的所有阶项进行了重求和，各向异性流体力学框架能够描述弱相互作用和强相互作用极限。 随后，我回顾了使用准粒子aHydro和二阶粘性aHydro的各向异性流体力学在相对论重离子碰撞中的现象学应用。 现象学结果显示，aHydro为耗散相对论流体力学提供了一个在重离子碰撞早期远离平衡阶段的可控扩展。 这使得人们可以更好地描述数据，并提取出比线性化二阶粘性流体力学更高的温度下输运系数随温度的变化关系。 显示英文摘要

摘要： In this contributed chapter, I review our current understanding of the applicability of hydrodynamics to modeling the quark-gluon plasma (QGP), focusing on the question of hydrodynamization/thermalization of the QGP and the anisotropic hydrodynamics (aHydro) far-from-equilibrium hydrodynamic framework. I discuss the existence of far-from-equilibrium hydrodynamic attractors and methods for determining attractors within different hydrodynamical frameworks. I also discuss the determination of attractors from exact solutions to the Boltzmann equation in relaxation time approximation and effective kinetic field theory applied to quantum chromodynamics. I then present comparisons of the kinetic attractors with the attractors obtained in standard second-viscous hydrodynamics frameworks and anisotropic hydrodynamics. I demonstrate that, due to the resummation of terms to all orders in the inverse Reynolds number, the anisotropic hydrodynamics framework can describe both the weak- and strong-interaction limits. I then review the phenomenological application of anisotropic hydrodynamics to relativistic heavy-ion collisions using both quasiparticle aHydro and second-order viscous aHydro. The phenomenological results indicate that aHydro provides a controlled extension of dissipative relativistic hydrodynamics to the early-time far-from-equilibrium stage of heavy-ion collisions. This allows one to better describe the data and to extract the temperature dependence of transport coefficients at much higher temperatures than linearized second-order viscous hydrodynamics.