Scaling in self-organized criticality from interface depinning?

Details Scaling in self-organized criticality from interface depinning? Scaling in self-organized criticality from interface depinning?

2002-04-10

arxiv.org/abs/cond-mat/0204226v1

J. Phys. Cond. Mat. 14, 2353 (2002)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 3 figures, Statphys satellite meeting in Merida, July 2001

Scientific paper

10.1088/0953-8984/14/9/324

The avalanche properties of models that exhibit 'self-organized criticality' (SOC) are still mostly awaiting theoretical explanations. A recent mapping (Europhys. Lett.~53, 569) of many sandpile models to interface depinning is presented first, to understand how to reach the SOC ensemble and the differences of this ensemble with the usual depinning scenario. In order to derive the SOC avalanche exponents from those of the depinning critical point, a geometric description is discussed, of the quenched landscape in which the 'interface' measuring the integrated activity moves. It turns out that there are two main alternatives concerning the scaling properties of the SOC ensemble. These are outlined in one dimension in the light of scaling arguments and numerical simulations of a sandpile model which is in the quenched Edwards-Wilkinson universality class.

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