标题： 手征相变中的平衡和弛豫时间包括再加热 显示英文标题

标题： Equilibration and relaxation times at the chiral phase transition including reheating

摘要： 我们研究手征对称性破缺的序参量、sigma平均场的松弛动力学，其中热浴由夸克和反夸克组成。 从含有组成夸克的线性sigma模型中得到一个半经典随机朗之万运动方程。 研究了系统在一级相变和临界点处的平衡化，发现不同的行为。 在一级相变处我们观察到相共存，在临界点处则观察到具有大松弛时间的临界减缓现象。 我们超越了现有的朗之万研究，并通过确定松弛过程中的能量耗散来包括热浴的再加热。 整个系统的能量是守恒的。 在临界点情景中我们再次观察到临界减缓现象。 显示英文摘要

摘要： We investigate the relaxational dynamics of the order parameter of chiral symmetry breaking, the sigma mean-field, with a heat bath consisting of quarks and antiquarks. A semiclassical stochastic Langevin equation of motion is obtained from the linear sigma model with constituent quarks. The equilibration of the system is studied for a first order phase transition and a critical point, where a different behavior is found. At the first order phase transition we observe the phase coexistence and at a critical point the phenomenon of critical slowing down with large relaxation times. We go beyond existing Langevin studies and include reheating of the heat bath by determining the energy dissipation during the relaxational process. The energy of the entire system is conserved. In a critical point scenario we again observe critical slowing down.