论文标题
Bjorken扩展的分析吸引子
Analytical attractor for Bjorken expansion
论文作者
论文摘要
我们提出了一组简单的方程组的分析解决方案，该方程控制了无质量颗粒的增强不变等离子体的扩展。这些方程式大约描述了早期，无碰撞状态以及在晚期向流体动力学的过渡。当应用于Bjorken流动时，它们的数学结构涵盖了二阶流体动力学的所有版本。分析解决方案为吸引者解决方案提供了明确的表达，该解决方案将无碰撞状态与流体动力学联系起来。它还构成了在渐近系列中复兴理论应用的整洁例子。
We present an analytic solution of a simple set of equations that govern the expansion of boost-invariant plasmas of massless particles. These equations describe, approximately, the early time, collisionless regime, and the transition to hydrodynamics at late time. Their mathematical structure encompasses all versions of second order hydrodynamics when applied to Bjorken flows. The analytic solution provides an explicit expression for the attractor solution that connects the collisionless regime to hydrodynamics. It also constitutes a neat example of an application of the theory of resurgence in asymptotic series.
