论文标题
通过持久性调音吸引和排斥
Tuning attraction and repulsion between active particles through persistence
论文作者
论文摘要
我们考虑持续运动之间的相互作用，该运动是活动粒子的通用特性，而后坐相互作用会导致颗粒在接触时跳跃。后坐力相互作用例证了颗粒之间的主动接触相互作用，该颗粒是无弹性的，并且由成分的活性性质产生。它的灵感来自某些微生物的“冲击”动力学，例如\ emph {pyramimonas octopus}，并始终在一对被动颗粒之间产生有效的排斥。根据后坐分布的形状，高度持久的颗粒可能具有吸引力或排斥。我们表明，排斥性案例承认了在中间持久性长度下向吸引力的意外过渡，这起源于持久性的对流效应。这允许主动粒子通过改变其持久性长度从根本上改变它们之间主动相互作用的集体效应。
We consider the interplay between persistent motion, which is a generic property of active particles, and a recoil interaction which causes particles to jump apart on contact. The recoil interaction exemplifies an active contact interaction between particles, which is inelastic and is generated by the active nature of the constituents. It is inspired by the `shock' dynamics of certain microorganisms, such as \emph{Pyramimonas octopus}, and always generates an effective repulsion between a pair of passive particles. Highly persistent particles can be attractive or repulsive, according to the shape of the recoil distribution. We show that the repulsive case admits an unexpected transition to attraction at intermediate persistence lengths, that originates in the advective effects of persistence. This allows active particles to fundamentally change the collective effect of active interactions amongst them, by varying their persistence length.
