Collective Motion of Vibrated Polar Disks
Collective Motion of Vibrated Polar Disks
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DOI：
10.1103/physrevlett.105.098001
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发表时间：
2010-08-23
影响因子：
8.6
通讯作者：
Chate, Hugues
中科院分区：
文献类型：
--
作者：
Deseigne, Julien;Dauchot, Olivier;Chate, Hugues
我们实验研究了一个单层的振动磁盘与内置的极性不对称，使他们能够移动准平衡在一个大的持久性长度。在碰撞过程中，由于自我推进和硬核排斥，会发生对齐。改变振动的振幅，我们观察到的大规模集体运动的发病和存在的巨大的数量波动的标度指数与预测的理论值一致。
We experimentally study a monolayer of vibrated disks with a built-in polar asymmetry which enables them to move quasibalistically on a large persistence length. Alignment occurs during collisions as a result of self-propulsion and hard core repulsion. Varying the amplitude of the vibration, we observe the onset of large-scale collective motion and the existence of giant number fluctuations with a scaling exponent in agreement with the predicted theoretical value.