论文标题
运动诱导的聚类的动力学：超越奥斯特瓦尔德成熟的变形
Dynamics of Motility-Induced clusters: coarsening beyond Ostwald ripening
论文作者
论文摘要
我们通过应用我们设计的算法来跟踪群集轨迹，研究了由运动诱导的相分离产生的活性布朗磁盘簇的动力学。我们确定了一种超越奥斯特瓦尔德成熟的聚合机制，但也产生$ z = 3 $。带有增强扩散性的质量$ M $ $ $ $ $ $ $ d \ sim $ pe $^2/\ sqrt {m} $的主动簇。它们的快速运动将聚合驱动到大型分形结构中，这些结构是各种六角形阶的拼布，并与规则，定向均匀的较小的分形结构共存。为了提出活动的影响，我们对一个被动系统进行了比较研究，该系统证明了与活动案例有主要差异。
We study the dynamics of clusters of Active Brownian Disks generated by Motility-Induced Phase Separation, by applying an algorithm that we devised to track cluster trajectories. We identify an aggregation mechanism that goes beyond Ostwald ripening but also yields $z=3$. Active clusters of mass $M$ self-propel with enhanced diffusivity $D\sim$ Pe$^2/\sqrt{M}$. Their fast motion drives aggregation into large fractal structures, which are patchworks of diverse hexatic orders, and coexist with regular, orientationally uniform, smaller ones. To bring out the impact of activity, we perform a comparative study of a passive system that evidences major differences with the active case.
