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Synchronized States Observed in Coupled Four Oscillators Hiroyuki KITAJIMA Hiroshi KAWAKAMI Tetsuo HATTORI Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E88-A No.3 pp.712-717 Publication Date: 2005/03/01 Online ISSN: DOI: 10.1093/ietfec/e88-a.3.712 Print ISSN: 0916-8508 Type of Manuscript: PAPER Category: Nonlinear Problems Keyword: coupled oscillator, bifurcation, phase synchronization, symmetry, Full Text: PDF(1.2MB)>>
Summary: In this paper, we examine oscillatory modes generated by the Hopf bifurcations of equilibrium points except for the origin in a system of coupled four oscillators. (The bifurcation analyses of the origin for many coupled oscillators were already done.) The Hopf bifurcations of the equilibrium points with strong symmetrical property and the generated oscillatory modes are classified. We observe four-phase, in-phase and a pair of anti-phase synchronized states. Even in a system of four coupled oscillators, we discover the existence of a stable three-phase oscillation. By the numerical bifurcation analysis of generated periodic oscillations we find out successive period-doubling bifurcations as the route to chaos and show some of them are symmetry-breaking bifurcations. As a result of the symmetry-breaking period-doubling bifurcations, a periodic solution with complete synchronization becomes a chaotic solution with phase synchronization. | ||||||||||
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