Randomness and a step-like distribution of pile heights in avalanche models

Alexander Shapoval and M. G. Shnirman

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 59, issue 3, 399-403

Abstract: This paper considers a one-parameter family of sand-piles. The family exhibits the crossover between the models with deterministic and stochastic relaxation. The mean pile height is used to describe the crossover. The height densities corresponding to the models with relaxation of both types approach one another as the parameter increases. Relaxation is supposed to deal with the local losses of grains by a fixed amount. In that case the densities show a step-like behaviour in contrast to the peaked shape found in the models with the local loss of grains down to a fixed level [S. Lübeck, Phys. Rev. E 62, 6149 (2000)]. A spectral approach based on the long-run properties of the pile height considers the models with deterministic and random relaxation more accurately and distinguishes between the two cases for admissible parameter values. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 05.70.Jk Critical point phenomena; 05.65.+b Self-organized systems (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00293-1

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