论文标题
具有角速度反转的活动颗粒的扩散
Diffusion of active particles with angular velocity reversal
论文作者
论文摘要
生物学和合成的微武器根据驱动力和扭矩显示各种游泳轨迹。在本文中，我们考虑了一种以恒定的自我刺激速度的简单自身螺旋体颗粒模型，但角度速度会随时间变化。具体而言，我们考虑了确定性和随机角速度逆转的情况，模仿了几种合成活性物质系统，例如推进液滴。使用Langevin动力学模拟和扰动方法研究了定向相关函数和有效扩散率。
Biological and synthetic microswimmers display a wide range of swimming trajectories depending on driving forces and torques. In this paper we consider a simple overdamped model of self-propelled particles with a constant self-propulsion speed, but an angular velocity that varies in time. Specifically, we consider the case of both deterministic and stochastic angular velocity reversal, mimicking several synthetic active matter systems like propelled droplets. The orientational correlation function and effective diffusivity is studied using Langevin dynamics simulations and perturbative methods.
