论文标题
增强不变等离子体的无XTAMINEDS水力动力学
Nonextensive hydrodynamics of boost-invariant plasmas
论文作者
论文摘要
我们使用Quasiparticle各向异性流体动力学来研究正在进行增强不变性Bjorken扩展系统的系统的非符号和非扩展动力学。为了介绍无Xtentensentive，我们使用基础的tsallis分布，并具有时间相关的无Xtententive参数$ q $。通过在松弛时间近似中摄取Quasiparticle Boltzmann方程，我们获得了动力学方程，使我们能够确定所有显微镜参数（包括$ Q $）的时间演变。我们比较了使用非Xtentive Evolution获得的大量可观察物的数值解决方案与使用胶质性流体动力学获得具有玻尔兹曼分布功能的结果（$ q \ rightarrow 1 $）获得的结果。我们表明，温度，压力比和缩放能量密度的演变对假定分布函数的敏感性非常不敏感。但是，我们发现散装压力的早期演变存在显着差异，这对于与玻尔兹曼分布函数的微小偏差也被观察到。最后，我们讨论了纵向和横向压力，散装和剪切粘性校正以及无Xtententive参数$ q $的非统一水动力吸引子的存在。
We use quasiparticle anisotropic hydrodynamics to study the non-conformal and non-extensive dynamics of a system undergoing boost-invariant Bjorken expansion. To introduce nonextensivity, we use an underlying Tsallis distribution with a time-dependent nonextensivity parameter $q$. By taking moments of the quasiparticle Boltzmann equation in the relaxation-time approximation, we obtain dynamical equations which allow us to determine the time evolution of all microscopic parameters including $q$. We compare numerical solutions for bulk observables obtained using the nonextensive evolution with results obtained using quasiparticle anisotropic hydrodynamics with a Boltzmann distribution function ($q \rightarrow 1$). We show that the evolution of the temperature, pressure ratio, and scaled energy density, are quite insensitive to which distribution function is assumed. However, we find significant differences in the early-time evolution of the bulk pressure which are observed for even small deviations from the Boltzmann distribution function. Finally, we discuss the existence of non-conformal hydrodynamic attractors for the longitudinal and transverse pressures, the bulk and shear viscous corrections, and the nonextensivity parameter $q$.
