Effect of rare events on out of equilibrium relaxation

Details Effect of rare events on out of equilibrium relaxation Effect of rare events on out of equilibrium relaxation

2005-12-16

arxiv.org/abs/cond-mat/0512403v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.95.268001

This letter reports experimental and numerical results on particle dynamics in an out-of-equilibrium granular medium. We observed two distinct types of grain motion: the well known cage motion, during which a grain is always surrounded by the same neighbors, and low probability "jumps", during which a grain moves significantly more relative to the others. These observations are similar to the results obtained for other out-of-equilibrium systems (glasses, colloidal systems, etc.). Although such jumps are extremely rare, by inhibiting them in numerical simulations we demonstrate that they play a significant role in the relaxation of out-of-equilibrium systems

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