论文标题
有效的单个成分描述活性浴中被动颗粒的稳态结构
Effective single component description of steady state structures of passive particles in an active bath
论文作者
论文摘要
我们使用活性浴中的被动颗粒之间的有效相互作用对被动和活性的布朗颗粒的二元混合物进行了建模。活性颗粒的活性和两种类型的颗粒的尺寸比是系统中的两个控制参数。有效相互作用是根据活性粒子产生的两个粒子的平均力计算得出的。根据系统参数，有效的相互作用可能具有吸引力或令人反感。被动颗粒形成不同系统参数的四个不同的结构阶；障碍（D），无序簇（DC），有序簇（OC）和多晶细胞（P C）。结构的变化取决于有效相互作用的性质的变化。我们进一步使用活性和被动混合物的完全微观模拟来确认四个结构。我们的研究对于了解非平衡系统中不同的集体行为很有用。
We model a binary mixture of passive and active Brownian particles in two dimensions using the effective interaction between passive particles in the active bath. The activity of active particles and the size ratio of two types of particles are two control parameters in the system. The effective interaction is calculated from the average force on two particles generated by the active particles. The effective interaction can be attractive or repulsive, depending on the system parameters. The passive particles form four distinct structural orders for different system parameters viz; disorder (D), disordered cluster (DC), ordered cluster (OC), and poly-crystalline order (P C). The change in structure is dictated by the change in nature of the effective interaction. We further confirm the four structures using full microscopic simulation of active and passive mixture. Our study is useful to understand the different collective behaviour in non-equilibrium systems.
