Physical Review E
We study the nature of statistical correlations that develop between systems of interacting self-organized critical automata (sandpiles). Numerical and analytical findings are presented describing the emergence of “synchronization” between sandpiles and the dependency of this synchronization on factors such as variations in coupling strength, toppling rule probabilities, symmetric versus asymmetric coupling rules, and numbers of sandpiles.
R. Gann, J. Venable, E.J. Friedman, and A.S. Landsberg . (2004). The Behavior of Coupled Automata. Physical Review E 69: 046116.