Critical scaling and heterogeneous superdiffusion across the jamming/rigidity transition of a granular glass

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dc.creatorLechenault, F.
dc.creatorDauchot, O.
dc.creatorBiroli, G.
dc.creatorBouchaud, J. -P.
dc.date2007-06-11
dc.date2008-03-14
dc.date.accessioned2026-07-07T09:58:01Z
dc.date.available2026-07-07T09:58:01Z
dc.descriptionThe dynamical properties of a dense horizontally vibrated bidisperse granular monolayer are experimentally investigated. The quench protocol produces states with a frozen structure of the assembly, but the remaining degrees of freedom associated with contact dynamics control the appearance of macroscopic rigidity. We provide decisive experimental evidence that this transition is a critical phenomenon, with increasingly collective and heterogeneous rearrangements occurring at length scales much smaller than the grains' diameter, presumably reflecting the contact force network fluctuations. Dynamical correlation time and length scales soar on both sides of the transition, as the volume fraction varies over a remarkably tiny range ($δϕ/ϕ\sim 10^{-3}$). We characterize the motion of individual grains, which becomes super-diffusive at the jamming transition $ϕ_J$, signaling long-ranged temporal correlations. Correspondingly, the system exhibits long-ranged four-point dynamical correlations in space that obey critical scaling at the transition density.
dc.description4 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0706.1531
dc.identifierhttp://arxiv.org/abs/0706.1531
dc.identifierEPL, 83 (2008) 46003
dc.identifierdoi:10.1209/0295-5075/83/46003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167565
dc.subjectSoft Condensed Matter
dc.titleCritical scaling and heterogeneous superdiffusion across the jamming/rigidity transition of a granular glass
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