Du Xiaojian, Schlichting Sören
Fakultät für Physik, Universität Bielefeld, D-33615 Bielefeld, Germany.
Phys Rev Lett. 2021 Sep 17;127(12):122301. doi: 10.1103/PhysRevLett.127.122301.
We explore the out-of-equilibrium dynamics of the quark-gluon plasma at zero and finite net-baryon density based on an effective kinetic theory of quantum chromodynamics (QCD). By investigating the isotropization of the longitudinal pressure, we determine the relevant time and temperature scales for the onset of viscous hydrodynamics and quantify the dependence on the chemical composition of the quark-gluon plasma. By extrapolating our results to realistic coupling strength, we discuss phenomenological consequences regarding the role of the preequilibrium phase at different collision energies.
我们基于量子色动力学（QCD）的有效动力学理论，研究了零净重子密度和有限净重子密度下夸克-胶子等离子体的非平衡动力学。通过研究纵向压力的各向同性化，我们确定了粘性流体动力学开始的相关时间和温度尺度，并量化了对夸克-胶子等离子体化学成分的依赖性。通过将我们的结果外推到实际耦合强度，我们讨论了关于不同碰撞能量下预平衡阶段作用的唯象学后果。
