标题： 非平衡吸引子在弛豫时间近似下的质量动力学理论 显示英文标题

标题： Far-from-equilibrium attractors for massive kinetic theory in the relaxation time approximation

摘要： 在本次会议论文中，我们总结了关于非共形动力学理论中早期和晚期吸引子存在的最新发现。我们研究了改变初始动量空间各向异性和初始化时间的影响，使用了一个质量与温度相关的弛豫时间的0+1D增强不变玻尔兹曼方程的精确解。我们的发现支持纵向压力吸引子的存在，但不支持体积粘滞压力和剪切压力存在不同的吸引子。考虑到大量积分矩，我们表明对于具有大于一个纵向动量平方幂次的矩，早期和晚期吸引子都存在。 显示英文摘要

摘要： In this proceedings contribution, we summarize recent findings concerning the presence of early- and late-time attractors in non-conformal kinetic theory. We study the effects of varying both the initial momentum-space anisotropy and initialization times using an exact solution of the 0+1D boost-invariant Boltzmann equation with a mass- and temperature-dependent relaxation time. Our findings support the existence of a longitudinal pressure attractor, but they do not support the existence of distinct attractors for the bulk viscous and shear pressures. Considering a large set of integral moments, we show that for moments with greater than one power of longitudinal momentum squared, both early- and late-time attractors are present.