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Aging and self-organized criticality in driven dissipative systems.

P Sibani¹, C M Andersen

¹Fysisk Institut, Syddansk Universitet-Odense Universitet, Odense, Denmark. paolo@planck.fys.ou.dk

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|August 11, 2001

Summary

This study explores noisy sandpile models, revealing two distinct behaviors: stable fluctuations or aging dynamics with punctuated events, similar to glassy systems.

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Area of Science:

Complex Systems
Statistical Physics

Background:

The original sandpile model is a foundational concept in studying self-organized criticality.
Understanding noisy dynamics in complex systems is crucial for various scientific fields.

Purpose of the Study:

To investigate the behavior of a modified sandpile model under different noise conditions.
To characterize the emergent dynamics, including stationary fluctuations and aging phenomena.

Main Methods:

Simulations of a sandpile model with varying noise parameters.
Analysis of system dynamics across different observation time scales.

Main Results:

Observed two primary dynamic regimes: stationary fluctuations and aging dynamics.

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Aging dynamics exhibit punctuated equilibria, decreasing event rates, and reset properties.

Conclusions:

The sandpile model's noisy dynamics can lead to behaviors analogous to self-organized criticality or glassy systems.
Findings highlight the sensitivity of complex system dynamics to noise and observation scale.