The abelian sandpile and related models

Details The abelian sandpile and related models The abelian sandpile and related models

1998-08-05

arxiv.org/abs/cond-mat/9808047v2

Physica A 263(1999) 4.

Physics

Condensed Matter

Statistical Mechanics

Typos and minor errors fixed and some references added

Scientific paper

10.1016/S0378-4371(98)00493-2

The Abelian sandpile model is the simplest analytically tractable model of self-organized criticality. This paper presents a brief review of known results about the model. The abelian group structure allows an exact calculation of many of its properties. In particular, one can calculate all the critical exponents for the directed model in all dimensions. For the undirected case, the model is related to q= 0 Potts model. This enables exact calculation of some exponents in two dimensions, and there are some conjectures about others. We also discuss a generalization of the model to a network of communicating reactive processors. This includes sandpile models with stochastic toppling rules as a special case. We also consider a non-abelian stochastic variant, which lies in a different universality class, related to directed percolation.

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