We investigate the dynamics of mobile inclusions embedded in 2D active nematics. The interplay between the inclusion shape, boundary-induced nematic order, and autonomous flows powers the inclusion motion. Disks and achiral gears exhibit unbiased rotational motion, but with distinct dynamics. In comparison, chiral gear-shaped inclusions exhibit long-term rectified rotation, which is correlated with dynamics and polarization of nearby $+1/2$ topological defects. The chirality of defect polarities and the active nematic texture around the inclusion correlate with the inclusion’s instantaneous rotation rate. Inclusions provide a promising tool for probing the rheological properties of active nematics and extracting ordered motion from their inherently chaotic motion.

中文翻译：

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二维主动向列中移动夹杂物的修正旋转动力学

我们研究了嵌入二维活性向列相中的移动夹杂物的动力学。夹杂物形状、边界引起的向列序和自主流之间的相互作用为夹杂物运动提供动力。圆盘和非手齿轮表现出无偏旋转运动，但具有独特的动力学特性。相比之下，手性齿轮状包裹体表现出长期的校正旋转，这与附近的动力学和极化相关。$+1/2$拓扑缺陷。缺陷极性的手性和夹杂物周围的活性向列结构与夹杂物的瞬时旋转速率相关。夹杂物为探测活性向列相的流变特性并从其固有的混沌运动中提取有序运动提供了一种有前景的工具。