Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion
Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion
复制标题
反馈诱导推进力下布朗粒子的自发速度排列
DOI：
10.1209/0295-5075/acdf19
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
S. Klapp
中科院分区：
文献类型：
--
作者：
Robin A. Kopp;S. Klapp
基于布朗动力学模拟，我们研究了一个由相互排斥的胶体粒子组成的二维系统的集体行为，其中每个粒子都受到时滞为τ的排斥反馈力的推动。尽管对相互作用是纯各向同性的，但我们观察到速度向量的自发的、大范围的排列。这种现象会持续很长一段时间，并且在没有稳态集群的情况下会发生。我们通过空间相互作用产生局部速度有序的影响和时间延迟的影响来解释我们的观察结果，时间延迟产生了长距离的团簇溶解、速度持续和速度排列。总体而言，这一行为揭示了有趣的相似之处，但也与在活性物质模型中观察到的不同之处，如活性布朗粒子和维塞克模型。
Based on Brownian dynamics simulations we study the collective behavior of a two-dimensional system of repulsively interacting colloidal particles, where each particle is propelled by a repulsive feedback force with time delay τ. Although the pair interactions are purely isotropic we observe a spontaneous, large-scale alignment of the velocity vectors. This phenomenon persists for long times and occurs in the absence of steady-state clustering. We explain our observations by a combination of the effect of steric interactions yielding local velocity ordering, and the effect of time delay, that generates cluster dissolution, velocity persistence and velocity alignment over large distances. Overall, the behavior reveals intriguing similarities, but also differences, with that observed in models of active matter, such as active Brownian particles and the Vicsek model.
影响因子：
1.8
作者：
Loeffler, Robert C.;Baeuerle, Tobias;Bechinger, Clemens
通讯作者：
Bechinger, Clemens