Super-Arrhenius slowing down in the metastable liquid of hard spheres

Details Super-Arrhenius slowing down in the metastable liquid of hard spheres Super-Arrhenius slowing down in the metastable liquid of hard spheres

2001-03-05

arxiv.org/abs/cond-mat/0103117v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevE.65.032501

It is demonstrated that a straightforward extension of the Arrhenius law accurately describes diffusion in the thermodynamically stable liquid of hard spheres. A sharp negative deviation from this behaviour is observed as the liquid is compressed beyond its stability limit, which can be compared with super-Arrhenius slowing down in supercooled liquids. It is suggested that the observed dynamical transition is caused by extra entropy barriers arising in the free-energy landscape. This interpretation is corroborated by the observation of characteristic anomalies in the geometry of a particle trajectory.

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