临界区和一级相变中的动力学涨落
Dynamical fluctuations in critical regime and across the 1st order phase transition
摘要：
在这一过程中，我们研究的σ场的动力学演化的朗之万动力学的框架内。我们发现，当系统在临界区演化时，由于$T_c$附近的记忆效应，σ场的累积量$C_{3}$和$C_{4}$的大小和符号与平衡态的有很大的不同.对于一级相变边界的动力学演化，过冷效应导致σ场在化学势中广泛分布，相应地大大增强了累积量$C_3, \ C_4$.
英文摘要：
In this proceeding, we study the dynamical evolution of the sigma field within the framework of Langevin dynamics. We find that, as the system evolves in the critical regime, the magnitudes and signs of the cumulants of sigma field, $C_{3}$ and $C_{4}$, can be dramatically different from the equilibrated ones due to the memory effects near $T_c$. For the dynamical evolution across the 1st order phase transition boundary, the supercooling effect leads the sigma field to be widely distributed in the thermodynamical potential, which largely enhances the cumulants $C_3, \ C_4$, correspondingly.
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