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Effect of rare events on out of equilibrium relaxation

Philippe Ribière·Patrick Richard·Renaud Delannay·Daniel Bideau·Masahiro Toiya·Wolfgang Losert
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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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Philippe Ribière, Patrick Richard, Renaud Delannay, Daniel Bideau, Masahiro Toiya, Wolfgang Losert. 2005-12-16. Effect of rare events on out of equilibrium relaxation. https://doi.org/10.1103/physrevlett.95.268001

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