Athermal Phase Separation of Self-Propelled Particles with No Alignment
Athermal Phase Separation of Self-Propelled Particles with No Alignment
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DOI：
10.1103/physrevlett.108.235702
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发表时间：
2012-06-08
影响因子：
8.6
通讯作者：
Marchetti, M. Cristina
中科院分区：
文献类型：
--
作者：
Fily, Yaouen;Marchetti, M. Cristina
我们用数值方法和解析方法研究了二维衬底上的自行式极盘模型。粒子通过各向同性排斥力相互作用，并受到旋转噪声的影响，但没有排列相互作用。因此，系统不会呈现有序状态。各向同性流体相在紧密堆积下分离，表现出在活性体系中普遍存在的大量波动和聚集。我们的工作表明，这种行为是局部失去平衡的系统的一般特性，例如由自推力驱动。
We study numerically and analytically a model of self-propelled polar disks on a substrate in two dimensions. The particles interact via isotropic repulsive forces and are subject to rotational noise, but there is no aligning interaction. As a result, the system does not exhibit an ordered state. The isotropic fluid phase separates well below close packing and exhibits the large number fluctuations and clustering found ubiquitously in active systems. Our work shows that this behavior is a generic property of systems that are driven out of equilibrium locally, as for instance by self-propulsion.