Collective Motion of Vibrated Polar Disks

被引：455

作者：

Deseigne, Julien ^{[1
]}

Dauchot, Olivier ^{[1
]}

Chate, Hugues ^{[1
]}

机构：

[1] CEA Saclay, Serv Phys Etat Condense, CNRS, URA 2464, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 09期

关键词：

GIANT NUMBER FLUCTUATIONS; HYDRODYNAMICS; FILAMENTS; ORDER;

D O I：

10.1103/PhysRevLett.105.098001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

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