论文标题
持不同政见者破坏活性颗粒物的植入
Motile dissenters disrupt the flocking of active granular matter
论文作者
论文摘要
我们报告了毫米大小的两步式杆的干燥活性颗粒物中的植入，而无需中间培养基。该系统在阈值面积分数下进行羊群过渡〜0.12粒子之间具有高方向相关性。但是，单步杆的杆不植入植物，并用作羊群形成的颗粒物中的持不同政见者。在持不同政见者的临界分数〜0.3时，系统的植入顺序被完全破坏了。系统顺序参数的差异显示在持不同政见者分数F〜0.05附近的最大值，表明有序相位和无序相之间有限大小的交叉。
We report flocking in the dry active granular matter of millimeter-sized two-step-tapered rods without an intervening medium. The system undergoes the flocking phase transition at a threshold area fraction ~ 0.12 having high orientational correlations between the particles. However, the one-step-tapered rods do not flock and are used as the motile dissenters in the flock-forming granular matter. At the critical fraction of dissenters ~ 0.3, the flocking order of the system gets completely destroyed. The variance of the system's order parameter shows a maximum near the dissenter fraction f ~ 0.05, suggesting a finite-size crossover between the ordered and disordered phases.
