KPZ scaling in topological mixing

Details KPZ scaling in topological mixing KPZ scaling in topological mixing

2010-02-09

arxiv.org/abs/1002.1791v1

Physics

Condensed Matter

Statistical Mechanics

5 pages, 5 figures

Scientific paper

In the spirit of recent works on topological chaos generated by sequential rotation of infinitely thin stirrers placed in a viscous liquid, we consider the statistical properties of braiding exponent which quantitatively characterizes the chaotic behavior of advected particles in two-dimensional flows. We pay a special attention to the random stirring protocol and study the time-dependent behavior of the variance of the braiding exponent. We show that this behavior belongs to the Kardar-Parisi-Zhang universality class typical for models of nonstationary growth. Using the matrix (Magnus) representation of the braid group generators, we relate the random stirring protocol with the growth of random heap generated by a ballistic deposition.

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