Zhang Feng, Xu Liufang, Wang Jin
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
Phys Chem Chem Phys. 2020 Dec 16;22(47):27896-27902. doi: 10.1039/d0cp03580g.
Chaos appears widely in various chemical and physical systems and is often accompanied by nonequilibrium due to its dissipative nature. However, it is still not clear how dissipative chaos is influenced by nonequilibrium conditions. Here, we study chaos from the perspective of nonequilibrium dynamics by considering a chemical Lorenz system. We found that its nonequilibrium nature can be quantified from the steady-state probability flux in the state space. The dynamic origin for the onset and offset of dissipative chaos was from the sudden appearance and disappearance of such nonequilibrium fluxes. Meanwhile, the dissipation associated with the flux as quantified by the entropy production rate provides the thermodynamic origin of dissipative chaos. Sharp changes in the degree of nonequilibrium also provide alternative quantitative indicators for the onset and offset of dissipative chaos.
混沌广泛出现在各种化学和物理系统中，由于其耗散性质，常常伴随着非平衡态。然而，目前仍不清楚耗散混沌是如何受到非平衡条件影响的。在此，我们通过考虑一个化学洛伦兹系统，从非平衡动力学的角度研究混沌。我们发现，其非平衡性质可以从状态空间中的稳态概率流进行量化。耗散混沌起始和终止的动力学起源来自于这种非平衡流的突然出现和消失。同时，由熵产生率量化的与流相关的耗散为耗散混沌提供了热力学起源。非平衡程度的急剧变化也为耗散混沌的起始和终止提供了替代的定量指标。
