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Memory in aged granular media

A. Barrat, V. Loreto

cond-mat.softarXiv:cond-mat/0006413

Abstract

Stimulated by recent experimental results, we simulate ``temperature''-cycling experiments in a model for the compaction of granular media. We report on the existence of two types of memory effects: short-term dependence on the history of the sample, and long-term memory for highly compact (aged) systems. A natural interpretation of these results is provided by the analysis of the density heterogeneities.

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