Effects of microscopic disorder on the collective dynamics of globally coupled maps

Abstract

This paper studies the effect of independent additive noise on the synchronous dynamics of large populations of globally coupled maps. Our analysis is complementary to the approach taken by Teramae and Kuramoto [Teramae and Kuramoto, Phys. Rev. E 63:036210, 2001] who pointed out the anomalous scaling properties preceding the loss of coherence. We focus on the macroscopic dynamics that remains deterministic at any noise level and differs from the microscopic one. Using properly defined order parameters, an analytical approach is proposed for describing the collective dynamics in terms of an approximate low-dimensional system. The systematic derivation of the macroscopic equations provides a link between the microscopic features of the population (single-element dynamics and noise distribution) and the properties of the emergent behaviour. The macroscopic bifurcations induced by noise are compared to those originating from parameter mismatches within the population.

27 pages, 6 figures

References in corpus (8)

• System size resonance in coupled noisy systems and in the Ising model
• Analytical and Numerical Studies of Noise-induced Synchronization of Chaotic Systems
• Coherent regimes of globally coupled dynamical systems
• Analytical results for coupled map lattices with long-range interactions
• Synchronization and oscillator death in oscillatory media with stirring
• Strong Desynchronizing Effects of Weak Noise in Globally Coupled Systems
• Noise-induced macroscopic bifurcations in globally-coupled chaotic units
• Collective motions in globally coupled tent maps with stochastic updating

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• Low-dimensional chaos in populations of strongly-coupled noisy maps
• Integrable order parameter dynamics of globally coupled oscillators
• The constructive role of diversity on the global response of coupled neuron systems