Globally coupled chaotic maps and demographic stochasticity

Details Globally coupled chaotic maps and demographic stochasticity Globally coupled chaotic maps and demographic stochasticity

2009-06-04

arxiv.org/abs/0906.0976v1

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

The affect of demographic stochasticity of a system of globally coupled chaotic maps is considered. A two-step model is studied, where the intra-patch chaotic dynamics is followed by a migration step that coupled all patches; the equilibrium number of agents on each site, $N$, controls the strength of the discreteness-induced fluctuations. For small $N$ (large fluctuations) a period-doubling cascade appears as the coupling (migration) increases. As $N$ grows an extremely slow dynamic emerges, leading to a flow along a one-dimensional family of almost period 2 solutions. This manifold become a true solutions in the deterministic limit. The degeneracy between different attractors that characterizes the clustering phase of the deterministic system is thus the $N \to \infty$ limit of the slow dynamics manifold.

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