论文标题
有效的相互作用在活性流体中的两个渗透磁盘之间介导
Effective interactions mediated between two permeable disks in an active fluid
论文作者
论文摘要
我们研究了在两个固定的，可渗透的（空心）磁盘状的夹杂物的情况下，在两个维度上研究了活性布朗颗粒（ABP）的稳态特性，其内部和外部区域可以表现出不匹配的运动性（自我刺激）的强度。我们表明，这种不连续的运动场强烈影响ABP的空间分布，从而通过活性浴中介导的夹杂物之间介导的有效相互作用。这种净相互作用是由ABP之间的软界面排斥产生的，ABP与空间相互作用和/或通过假定包围夹杂物的可渗透膜。在整体图中，均报道并总结了排斥制度和吸引力（尽管具有不同的机制）。
We study steady-state properties of a bath of active Brownian particles (ABPs) in two dimensions in the presence of two fixed, permeable (hollow) disklike inclusions, whose interior and exterior regions can exhibit mismatching motility (self-propulsion) strengths for the ABPs. We show that such a discontinuous motility field strongly affects spatial distribution of ABPs and thus also the effective interaction mediated between the inclusions through the active bath. Such net interactions arise from soft interfacial repulsions between ABPs that sterically interact with and/or pass through permeable membranes assumed to enclose the inclusions. Both regimes of repulsion and attractive (albeit with different mechanisms) are reported and summarized in overall phase diagrams.
