论文标题
运动性诱导的二维活性布朗粒子系统中的运动性诱导的微相和巨噬剂分离
Motility-Induced Microphase and Macrophase Separation in a Two-Dimensional Active Brownian Particle System
论文作者
论文摘要
由于非平衡力，纯粹的自propelled颗粒会在致密相和稀阶段之间进行巨噬剂的分离。我们详细介绍了这种运动性诱导的相位分离（MIP）在二维中有效的布朗颗粒中的排序动力学，我们表明它通常伴随着显微相机的分离。密集相的生长遵循类似于液态气相分离的法律。然而，它是由示象微区的镶嵌物制成的，其大小不会无限期地磨损，留下了一个扩展的拓扑缺陷网络，从中出现了微观稀释气泡。这些有限大小结构的特征长度随着活性而增加，而与初始条件的选择无关。
As a result of nonequilibrium forces, purely repulsive self-propelled particles undergo macrophase separation between a dense and a dilute phase. We present a thorough study of the ordering kinetics of such motility-induced phase separation (MIPS) in active Brownian particles in two dimensions, and we show that it is generically accompanied by microphase separation. The growth of the dense phase follows a law akin to the one of liquid-gas phase separation. However, it is made of a mosaic of hexatic microdomains whose size does not coarsen indefinitely, leaving behind a network of extended topological defects from which microscopic dilute bubbles arise. The characteristic length of these finite-size structures increases with activity, independently of the choice of initial conditions.
