Nonlinear Sciences – Pattern Formation and Solitons
Scientific paper
2005-04-23
Nonlinear Sciences
Pattern Formation and Solitons
34 pages, 12 figures. Published in International Journal of Bifurcation and Chaos 16 (1), 21: January 2006. Version 2 - correc
Scientific paper
10.1142/S0218127406014551
Arrays of identical limit-cycle oscillators have been used to model a wide variety of pattern-forming systems, such as neural networks, convecting fluids, laser arrays, and coupled biochemical oscillators. These systems are known to exhibit rich collective behavior, from synchrony and traveling waves to spatiotemporal chaos and incoherence. Recently, Kuramoto and his colleagues reported a strange new mode of organization--here called the chimera state--in which coherence and incoherence exist side by side in the same system of oscillators. Such states have never been seen in systems with either local or global coupling; they are apparently peculiar to the intermediate case of nonlocal coupling. Here we give an exact solution for the chimera state, for a one-dimensional ring of phase oscillators coupled nonlocally by a cosine kernel. The analysis reveals that the chimera is born in a continuous bifurcation from a spatially modulated drift state, and dies in a saddle-node collision with an unstable version of itself.
Abrams Daniel M.
Strogatz Steven H.
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