Noise-induced macroscopic bifurcations in globally coupled chaotic units.
Large populations of globally coupled identical maps subjected to independent additive noise are shown to undergo qualitative changes as the features of the stochastic process are varied. We show that, for strong coupling, the collective dynamics can be described in terms of a few effective macroscopic degrees of freedom, whose deterministic equations of motion are systematically derived through an order parameter expansion.
De Monte
Silvia
S
Chaos Group, The Technical University of Denmark, DK 2800 Lyngby, Denmark.
d'Ovidio
Francesco
F
Chaté
Hugues
H
Mosekilde
Erik
E