Dynamical scaling for probe particles in a driven fluid

Details Dynamical scaling for probe particles in a driven fluid Dynamical scaling for probe particles in a driven fluid

2006-08-04

arxiv.org/abs/cond-mat/0608130v2

Journal of Statistical Mechanics: Theory and Experiment 2006 P11001

Physics

Condensed Matter

Statistical Mechanics

14 pages, 6 figures, v2: minor alterations, two paragraphs added. Published in Journal of Statistical Mechanics: Theory and Ex

Scientific paper

10.1088/1742-5468/2006/11/P11001

We investigate two distinct universality classes for probe particles that move stochastically in a one-dimensional driven system. If the random force that drives the probe particles is fully generated by the current fluctuations of the driven fluid, such as when the probe particles are embedded in a ring, they inherit the dynamical exponent of the fluid, which generically is z=3/2. On the other hand, if the random force has a part that is temporally uncorrelated, the resulting motion can be described by a dynamical exponent z=2 as considered in previous work.

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