Jamming Mechanisms and Density Dependence in a Kinetically-Constrained Model

Details Jamming Mechanisms and Density Dependence in a Kinetically-Constrained Model Jamming Mechanisms and Density Dependence in a Kinetically-Constrained Model

2009-09-03

arxiv.org/abs/0909.0740v3

EPL 90, 26005 (2010)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1209/0295-5075/90/26005

We add relaxation mechanisms that mimic the effect of temperature and non-equilibrium driving to the recently-proposed spiral model which jams at a critical density rho_c < 1. This enables us to explore unjamming by temperature or driving at rho_c < rho < 1. We numerically calculate the relaxation time of the persistence function and its spatial heterogeneity. We disentangle the three different relaxation mechanisms responsible for unjamming when varying density, temperature, and driving strength, respectively. We show that the spatial scale of dynamic heterogeneity depends on density much more strongly than on temperature and driving.

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