标题： 边缘态、配对和运动手性粒子的排序 显示英文标题

标题： Edge states, pairing, and sorting of motile chiral particles

摘要： 我们对手性主动极性粒子进行了实验，这些粒子被实现为振动的颗粒棒，揭示了在硬边界处形成稳定的“跳跃轨道”。这些边缘态表现出与粒子固有旋转方向相反的净循环，并导致边界处明显的积累，比其非手性对应物更显著。这些轨道的定向特性提供了一种简单而高保真的手性分选机制——即使对于单独的粒子也是如此，这与T Barois等人在Phys. Rev. Lett. 125, 238003 (2020)中的结果不同。我们提出了一个统一的理论框架，用于描述手性和非手性粒子的边界相互作用。在这个模型中，一种有效的向外径向力，与运动性和手性成正比，解释了观察到的边界紧贴现象。我们的理论预测并经实验确认，随着周围介质中颗粒的填充分数增加，相同手性的两个粒子的配对会发生转变，从非极性旋转器转变为极性圆周行走者。 显示英文摘要

摘要： We present experiments on chiral active polar particles, realized as vibrated granular rods, revealing the formation of robust ``skipping orbits'' at hard boundaries. These edge states exhibit a net circulation opposite to the particles' intrinsic rotation and lead to a pronounced accumulation at the boundary, stronger than for their achiral counterparts. The directed nature of these orbits provides a simple yet high-fidelity mechanism for chiral sorting -- even for solitary particles, unlike in T Barois et al., Phys. Rev. Lett. 125 , 238003 (2020). We propose a unified theoretical framework for boundary interactions of both chiral and achiral particles. In this model, an effective outward radial force, proportional to motility and chirality, explains the observed boundary-hugging. Our theory predicts, and our experiments confirm, a transition in the pairing of two particles of the same chirality, from apolar spinners to polar circle walkers, with increasing packing fraction of an ambient medium of beads.