论文标题
具有现实的状态不合格方程式的远程平衡吸引子
Far-from-equilibrium attractors with a realistic non-conformal equation of state
论文作者
论文摘要
使用各向异性流体动力学，我们研究了经历Bjorken扩展的非统一系统的早期吸引子的存在。在恒定质量的情况下，我们发现缩放纵向压力的演变对收敛到早期通用曲线的初始条件的变化不敏感，并最终与后期的Navier-Stokes吸引子（流体动力吸引子）合并。另一方面，散装和剪切粘性校正并未显示早期吸引者的行为。这些结果与以前考虑恒定质量的研究一致。当具有热质量的动力学中包括现实的状态方程式时，我们首次证明缺乏严格的后期通用吸引子。但是，在很晚的时间里，进化的半宇宙特征仍然存在。
Using anisotropic hydrodynamics, we examine the existence of early-time attractors of non-conformal systems undergoing Bjorken expansion. In the case of a constant mass, we find that the evolution of the scaled longitudinal pressure is insensitive to variations of initial conditions converging onto an early-time universal curve and eventually merging with the late-time Navier-Stokes attractor (the hydrodynamic attractor). On the other hand, the bulk and the shear viscous corrections do not show an early-time attractor behavior. These results are consistent with previous studies considering a constant mass. When a realistic equation of state is included in the dynamics with a thermal mass, we demonstrate for the first time the absence of strict late-time universal attractors. However, a semi-universal feature of the evolution at very late times remains.
