稀活性布朗粒子的对关联：从低活性偶极修正到高活性代数耗尽翼
Pair correlation of dilute Active Brownian Particles: from low activity dipolar correction to high activity algebraic depletion wings
摘要：
本文采用数值模拟和解析计算相结合的方法研究了低密度下活性布朗粒子的对关联。我们观察到一个翅膀对相关性：而粒子积累在前面的一个活性粒子的预期，耗尽尾流由两个耗尽翅膀。在软粒子的限制，我们得到一个封闭的方程对相关，使我们能够表征耗尽翼。特别是，我们揭示了两个政权在高活性的翅膀采取自相似的配置文件和代数衰减。我们还进行了自推进的Janus粒子的实验，并确实观察到了耗尽翼。
英文摘要：
We study the pair correlation of Active Brownian Particles at low density using numerical simulations and analytical calculations. We observe a winged pair correlation: while particles accumulate in front of an active particle as expected, the depletion wake consists of two depletion wings. In the limit of soft particles, we obtain a closed equation for the pair correlation, allowing us to characterize the depletion wings. In particular, we unveil two regimes at high activity where the wings adopt a self-similar profile and decay algebraically. We also perform experiments of self-propelled Janus particles and indeed observe the depletion wings.
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