Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-02-20
Phys. Rev. Lett. 89, 104303 (2002)
Physics
Condensed Matter
Statistical Mechanics
4 pages, 4 figures, minor changes
Scientific paper
10.1103/PhysRevLett.89.104303
We study sandpile models with stochastic toppling rules and having sticky grains so that with a non-zero probability no toppling occurs, even if the local height of pile exceeds the threshold value. Dissipation is introduced by adding a small probability of particle loss at each toppling. Generically, for models with a preferred direction, the avalanche exponents are those of critical directed percolation clusters. For undirected models, avalanche exponents are those of directed percolation clusters in one higher dimension.
Dhar Deepak
Mohanty Pravata Kumar
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