Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-03-07
Physica A: Statistical and Theoretical Physics, Volume 373, 1 January 2007, Pages 215-230
Physics
Condensed Matter
Statistical Mechanics
Accepted by Physica A, revised 22 March 2006, available online 26 May 2006 (16 pages, 21 figures)
Scientific paper
10.1016/j.physa.2006.05.001
We show that correlated dynamics and long time memory persist in self-organized criticality (SOC) systems even when forced away from the defined critical point that exists at vanishing drive strength. These temporal correlations are found for all levels of external forcing as long as the system is not overdriven. They arise from the same physical mechanism that produces the temporal correlations found at the vanishing drive limit, namely the memory of past events stored in the system profile. The existence of these correlations contradicts the notion that a SOC time series is simply a random superposition of events with sizes distributed as a power law, as has been suggested by previous studies.
Carreras Benjamin A.
Newman David E.
Sanchez Raul
Woodard Ryan
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