论文标题
Bjorken流中混合粘性流体的流体动力吸引子
Hydrodynamic attractor of a hybrid viscous fluid in Bjorken flow
论文作者
论文摘要
混合粘性流体模型的增强不变的Bjorken流动中的非平衡进化，该模型包含两个具有不同粘度的相互作用的组件，以表明它们强烈且弱耦合的扇区，表现为自我耦合的扇区，其特征在于水力动力学吸引者的早期时光行为，其早期的表现为较重的效果较重的效果，以实现这种状态的效果。这两个部门的流体动物化时间可能会有很大差异，其细节取决于二维吸引子表面上实现的曲线，这可能是核碰撞中小型和大型系统的不同情况。总系统的行为就像单个粘性流体，具有动态确定的有效剪切粘度。
The nonequilibrium evolution in a boost-invariant Bjorken flow of a hybrid viscous fluid model containing two interacting components with different viscosities, such that they represent strongly and weakly self-coupled sectors, is shown to be characterized by a hydrodynamic attractor which has an early-time behavior that is reminiscent of the so-called bottom-up thermalization scenario in heavy-ion collisions. The hydrodynamization times for the two sectors can differ strongly, with details depending on the curve realized on the two-dimensional attractor surface, which might account for different scenarios for small and large systems in nuclear collisions. The total system behaves like a single viscous fluid with a dynamically determined effective shear viscosity.
