Exact solution of stochastic directed sandpile model

Details Exact solution of stochastic directed sandpile model Exact solution of stochastic directed sandpile model

2000-05-30

arxiv.org/abs/cond-mat/0005528v3

Phys. Rev. E63, 026111 (2001).

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures. Added numerical data for 3D case (2nd figure)

Scientific paper

10.1103/PhysRevE.63.026111

We introduce and analytically solve a directed sandpile model with stochastic toppling rules. The model clearly belongs to a different universality class from its counterpart with deterministic toppling rules, previously solved by Dhar and Ramaswamy. The critical exponents are D_||=7/4, \tau=10/7 in two dimensions and D_||=3/2, \tau=4/3 in one dimension. The upper critical dimension of the model is three, at which the exponents apart from logarithmic corrections reach their mean-field values D_||=2, \tau=3/2.

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