论文标题
随机templex编码噪声驱动的混沌动力学中的拓扑倾斜点
Random templex encodes topological tipping points in noise-driven chaotic dynamics
论文作者
论文摘要
随机吸引子是随机扰动的,确定性混乱的动力学系统的随着时间不断发展的回调吸引者。这些吸引子的结构在时间变化,并且最近使用{\ sc bramah}细胞复合物及其同源组进行了表征。通过用有向图赋予细胞复合物的确定性对应物,该描述得到了进一步改进,该图编码了相位空间中流量访问复合物中的细胞中的细胞中的顺序。 templex是由复杂和挖掘物形成的数学对象。它提供了对确定性混乱吸引子的精细描述,并允许其准确的分类。在确定性的框架中,Templex的挖掘过程一直在单个复合物中连接。在这里,我们介绍了Templex的随机版本。在一个随机的templex中,每个快照的随机吸引子有一个复合物,而挖掘物将连续的细胞复合物的发电机或``孔''连接起来。临界点出现在一个随机的庙宇中,因为其运动中的孔的急剧变化,即它们的出生,分裂,合并或死亡。本文介绍并计算了噪声驱动的洛伦兹系统的随机吸引子(Lora)的随机Templex。
Random attractors are the time-evolving pullback attractors of stochastically perturbed, deterministically chaotic dynamical systems. These attractors have a structure that changes in time, and that has been characterized recently using {\sc BraMAH} cell complexes and their homology groups. This description has been further improved for their deterministic counterparts by endowing the cell complex with a directed graph, which encodes the order in which the cells in the complex are visited by the flow in phase space. A templex is a mathematical object formed by a complex and a digraph; it provides a finer description of deterministically chaotic attractors and permits their accurate classification. In a deterministic framework, the digraph of the templex connects cells within a single complex for all time. Here, we introduce the stochastic version of a templex. In a random templex, there is one complex per snapshot of the random attractor and the digraph connects the generators or ``holes'' of successive cell complexes. Tipping points appear in a random templex as drastic changes of its holes in motion, namely their birth, splitting, merging, or death. This paper introduces and computes the random templex for the noise-driven Lorenz system's random attractor (LORA).