Large-scale structure from superdiffusion in a driven dissipative system

Details Large-scale structure from superdiffusion in a driven dissipative system Large-scale structure from superdiffusion in a driven dissipative system

2010-03-08

arxiv.org/abs/1003.1622v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures + 1 table

Scientific paper

A system far from equilibrium is characterized by unconventional many-body dynamical effects, which can lead to anomalous density fluctuations and mass transport. Interestingly, these structural and dynamic features often emerge simultaneously in driven dissipative systems. Here we seek an origin of their co-existence by numerical simulations of a two-dimensional driven granular gas. We reveal a causal link between superdiffusive transport and giant density fluctuations. The kinetic dissipation upon particle collisions depends on the relative velocity of colliding particles, and is responsible for the self-generated large-scale persistent directional motion of particles that underlies the link between structure and transport. This scenario is supported by a simple scaling argument.

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