论文标题
具有可调内部结构的超平均活性手性流体
Hyperuniform Active Chiral Fluids with Tunable Internal Structure
论文作者
论文摘要
在活动系统中观察到的大密度波动和超均匀性是两个看似不相容的现象。然而，最近已经在手性颗粒形成的非平衡流体中预测了超均匀状态的形成，并以相同的触角进行圆形运动。在这里，我们报告了由手性活性液中实现的过度均匀性的证据，该液体由梨形的Quincke任意握手滚轮组成。我们表明，由动态聚类触发的超均匀性和较大的密度波动，在该系统中以不同的长度尺度共存。随着颗粒运动的曲率，系统失去了超均匀性，将它们转化为局部旋转器。我们的结果在实验上证明了一种新型的超明均匀活性流体，并为手性，活性和超均匀性之间的相互作用提供了新的见解。
Large density fluctuations observed in active systems and hyperuniformity are two seemingly incompatible phenomena. However, the formation of hyperuniform states has been recently predicted in non-equilibrium fluids formed by chiral particles performing circular motion with the same handedness. Here we report evidence of hyperuniformity realized in a chiral active fluid comprised of pear-shaped Quincke rollers of arbitrary handedness. We show that hyperuniformity and large density fluctuations, triggered by dynamic clustering, coexist in this system at different length scales. The system loses its hyperuniformity as the curvature of particles' motion increases transforming them into localized spinners. Our results experimentally demonstrate a novel hyperuniform active fluid and provide new insights into an interplay between chirality, activity and hyperuniformity.
