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Abstract: We investigate the full phase diagram of a column of grains near jamming, asa function of varying levels of frustration. Frustration is modelled by theeffect of two opposing fields on a grain, due respectively to grains above andbelow it. The resulting four dynamical regimes ballistic, logarithmic,activated and glassy are characterised by means of the jamming time ofzero-temperature dynamics, and of the statistics of attractors reached by thelatter. Shape effects are most pronounced in the cases of strong and weakfrustration, and essentially disappear around a mean-field point.



Author: J.M. Luck, A. Mehta

Source: https://arxiv.org/







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