Effect of rare events on out-of-equilibrium relaxation |
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Authors: | Ribière Philippe Richard Patrick Delannay Renaud Bideau Daniel Toiya Masahiro Losert Wolfgang |
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Affiliation: | GMCM, UMR CNRS 6626, Université de Rennes I, France. |
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Abstract: | 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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