Slow dynamics and precursors of the glass transition in granular fluids

Details Slow dynamics and precursors of the glass transition in granular fluids Slow dynamics and precursors of the glass transition in granular fluids

2011-06-16

arxiv.org/abs/1106.3239v3

Phys. Rev. E 84, 031305 (2011)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 16 figures

Scientific paper

10.1103/PhysRevE.84.031305

We use event driven simulations to analyze glassy dynamics as a function of density and energy dissipation in a two-dimensional bidisperse granular fluid under stationary conditions. Clear signatures of a glass transition are identified, such as an increase of relaxation times over several orders of magnitude. As the inelasticity is increased, the glass transition is shifted to higher densities and the precursors of the transition become less and less pronounced -- in agreement with a recent mode-coupling theory. We analyze the long-time tails of the velocity autocorrelation and discuss its consequences for the nonexistence of the diffusion constant in two dimensions.

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