Criticality in driven cellular automata with defects

Details Criticality in driven cellular automata with defects Criticality in driven cellular automata with defects

1995-12-07

arxiv.org/abs/cond-mat/9512049v1

Physica A 224, 188 (1996)

Physics

Condensed Matter

13 pages, Latex, 6 PostScript figures included, all uuencoded Z-compressed tar

Scientific paper

We study three models of driven sandpile-type automata in the presence of quenched random defects. When the dynamics is conservative, all these models, termed the random sites (A), random bonds (B), and random slopes (C), self-organize into a critical state. For Model C the concentration-dependent exponents are nonuniversal. In the case of nonconservative defects, the asymptotic state is subcritical. Possible defect-mediated nonequilibrium phase transitions are also discussed.

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