Collective Motion of Vibrated Polar Disks

Details Collective Motion of Vibrated Polar Disks Collective Motion of Vibrated Polar Disks

2010-04-09

arxiv.org/abs/1004.1499v1

Phys. Rev. Lett 105 135702 (2010)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.105.135702

We experimentally study a monolayer of vibrated disks with a built-in polar asymmetry which enables them to move quasi-balistically 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.

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