Fermi-like behavior of weakly vibrated granular matter

Details Fermi-like behavior of weakly vibrated granular matter Fermi-like behavior of weakly vibrated granular matter

2005-01-15

arxiv.org/abs/cond-mat/0501363v2

Phys. Rev. Lett. 95, 108003 (2005)

Physics

Condensed Matter

Statistical Mechanics

4 pages Phys. Rev., 3 figures

Scientific paper

10.1103/PhysRevLett.95.108003

Vertical movement of zirconia-yttria stabilized 2 mm balls is measured by a laser facility at the surface of a vibrated 3D granular matter under gravity. Realizations z(t) are measured from the top of the container by tuning the fluidized gap with a 1D measurement window in the direction of the gravity. The statistics obeys a Fermi-like configurational approach which is tested by the relation between the dispersions in amplitude and velocity. We introduce a generalized equipartition law to characterize the ensemble of particles which cannot be described in terms of a Brownian motion. The relation between global granular temperature and the external excitation frequency is established.

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