强约束下宏观活动粒子的冲浪和爬行--惯性动力学
Surfing and crawling macroscopic active particles under strong confinement -- inertial dynamics
摘要：
我们研究了两种类型的活动（自推进）宏观粒子约束下：樟脑冲浪者和hexbug爬虫，使用相结合的实验，理论和数值方法。与广泛研究的微观活性粒子和游泳者不同，热力通常很重要，惯性可以忽略不计，我们的宏观粒子表现出复杂的动力学，这是由于主动非热噪声与惯性效应相结合。强约束诱导在边界内的有限距离处的积累，并产生三种可区分的动力学状态;这两种状态都取决于活动和惯性。这些令人惊讶的复杂动力学已经出现在单粒子水平上-突出了宏观活性物质中惯性的重要性。
英文摘要：
We study two types of active (self-propelled) macroscopic particles under confinement: camphor surfers and hexbug crawlers, using a combined experimental, theoretical, and numerical approach. Unlike widely studied microscopic active particles and swimmers, where thermal forces are often important and inertia is negligible, our macroscopic particles exhibit complex dynamics due expressly to active non-thermal noise combined with inertial effects. Strong confinement induces accumulation at a finite distance within the boundary and gives rise to three distinguishable dynamical states; both depending on activity and inertia. These surprisingly complex dynamics arise already at the single particle level -- highlighting the importance of inertia in macroscopic active matter.
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