%0 Journal Article
%@ 0031-9007
%A Chessa, Alessandro
%A Marinari, Enzo
%A Vespignani, Alessandro
%D 1998
%F eprints:1870
%I American Physical Society
%J Physical Review Letters
%K PACS: 64.60.Lx, 05.40.+j, 05.70.Ln, 46.10.+z  
%P 4217-4220
%T Energy constrained sandpile models
%U http://eprints.imtlucca.it/1870/
%V 80
%X We study two driven dynamical systems with conserved energy. The two automata contain the basic dynamical rules of the Bak, Tang, and Wiesenfeld sandpile model. In addition a global constraint on the energy contained in the lattice is imposed. In the limit of an infinitely slow driving of the system, the conserved energy E becomes the only parameter governing the dynamical behavior of the system. Both models show scale-free behavior at a critical value Ec of the fixed energy. The scaling with respect to the relevant scaling field points out that the developing of critical correlations is in a different universality class than self-organized critical sandpiles. Despite this difference, the activity (avalanche) probability distributions appear to coincide with the one of the standard self-organized critical sandpile.
%Z © 1998 American Physical Society