论文标题
手性活动系统的分析方法：抑制相互作用的布朗圆圈游泳者的相位分离
Analytical approach to chiral active systems: suppressed phase separation of interacting Brownian circle swimmers
论文作者
论文摘要
我们通过示例研究具有球形形状的布朗圆圈游泳者的平面系统的相位行为来考虑主动系统中的手性。继续在[G.-J. Liao，S。H. L. Klapp，软物质，2018，14，7873-7882]，我们得出了一种预测的田间理论，能够描述圈子游泳者的集体动力学。该理论产生了圆形游泳者和非循环活跃的布朗尼颗粒之间的映射，并预测颗粒的角度推进会导致抑制其运动诱导的相位分离，并且与以前的模拟结果一致。此外，该理论提供了与运动性诱导的相位分离和相关临界点以及它们对圆圈游泳者的角度推进的相关的旋转的分析表达式。我们通过加权图理论网络对Brownian Dynamics模拟以及对集体动力学进行分析确认了我们的发现。发现理论和模拟结果之间的一致性是良好的。
We consider chirality in active systems by exemplarily studying the phase behavior of planar systems of interacting Brownian circle swimmers with a spherical shape. Continuing previous work presented in [G.-J. Liao, S. H. L. Klapp, Soft Matter, 2018, 14, 7873-7882], we derive a predictive field theory that is able to describe the collective dynamics of circle swimmers. The theory yields a mapping between circle swimmers and noncircling active Brownian particles and predicts that the angular propulsion of the particles leads to a suppression of their motility-induced phase separation, being in line with previous simulation results. In addition, the theory provides analytical expressions for the spinodal corresponding to the onset of motility-induced phase separation and the associated critical point as well as for their dependence on the angular propulsion of the circle swimmers. We confirm our findings by Brownian dynamics simulations and an analysis of the collective dynamics using a weighted graph-theoretical network. The agreement between results from theory and simulation is found to be good.
