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LETTER TO THE EDITOR

Universality classes in directed sandpile models

Romualdo Pastor-Satorras et al 2000 J. Phys. A: Math. Gen. 33 L33-L39   doi: 10.1088/0305-4470/33/3/101  Help

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Romualdo Pastor-Satorras and Alessandro Vespignani
The Abdus Salam International Centre for Theoretical Physics (ICTP), PO Box 586, 34100 Trieste, Italy

Abstract. We perform large-scale numerical simulations of a directed version of the two-state stochastic sandpile model. Numerical results show that this stochastic model defines a new universality class with respect to the Abelian directed sandpile. The physical origin of the different critical behaviour has to be ascribed to the presence of multiple topplings in the stochastic model. These results provide new insight into the long-debated question of universality in Abelian and stochastic sandpiles.

Print publication: Issue 3 (28 January 2000)
Received 27 July 1999

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