Jamming mechanisms and density dependence in a kinetically constrained model

Y. Shokef*, A. J. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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 ρc < 1. This enables us to explore unjamming by temperature or driving at ρc < ρ < 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.

Original languageEnglish
Article number26005
JournalJournal de Physique (Paris), Lettres
Issue number2
StatePublished - Apr 2010
Externally publishedYes


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