论文标题
非符号等离子体中的远程平衡吸引子
Far-from-equilibrium attractor in non-conformal plasmas
论文作者
论文摘要
我们研究了动力学理论和流体动力学中Bjorken扩展非符号系统的遥远平衡动力学。我们表明，与共形案例相比，剪切和散装粘性压力既不迅速放松到非平衡吸引子。在动力学理论中，由于培养基的快速纵向膨胀而驱动了缩放纵向压力的早期，远程平衡的吸引子。二阶耗散流体动力学无法准确描述该吸引子，但是经过修改的各向异性流体动力制剂可再现它，并与动力学理论提供了极好的一致性。
We study the far-off-equilibrium dynamics of a Bjorken expanding non-conformal system within kinetic theory and hydrodynamics. We show that, in contrast to the conformal case, neither shear nor bulk viscous pressure relax quickly to a non-equilibrium attractor. In kinetic theory an early-time, far-from-equilibrium attractor exists for the scaled longitudinal pressure, driven by the rapid longitudinal expansion of the medium. Second-order dissipative hydrodynamics fails to accurately describe this attractor, but a modified anisotropic hydrodynamic formulation reproduces it and provides excellent agreement with kinetic theory.
