Data di Pubblicazione:
1994
Citazione:
Renormalization scheme for self-organized criticality in sandpile models / L. Pietronero, A. Vespignani, S. Zapperi. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 72:11(1994 Mar 14), pp. 1690-1693.
Abstract:
We introduce a renormalization scheme of novel type that allows us to characterize the critical state and the scale invariant dynamics in sandpile models. The attractive fixed point clarifies the nature of self-organization in these systems. Universality classes can be identified and the critical exponents can be computed analytically. We obtain τ=1.253 for the avalanche exponent and z=1.234 for the dynamical exponent. These results are in good agreement with computer simulations. The method can be naturally extended to other problems with nonequilibrium stationary states.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
universality
Elenco autori:
L. Pietronero, A. Vespignani, S. Zapperi
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