Li, Dong and Cross, M. C. and Zhou, Changsong and Zheng, Zhigang (2012) Quasiperiodic, periodic, and slowing-down states of coupled heteroclinic cycles. Physical Review E, 85 (1). 016215 . ISSN 1539-3755 http://resolver.caltech.edu/CaltechAUTHORS:20120302-134815034
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We investigate two coupled oscillators, each of which shows an attracting heteroclinic cycle in the absence of coupling. The two heteroclinic cycles are nonidentical. Weak coupling can lead to the elimination of the slowing-down state that asymptotically approaches the heteroclinic cycle for a single cycle, giving rise to either quasiperiodic motion with separate frequencies from the two cycles or periodic motion in which the two cycles are synchronized. The synchronization transition, which occurs via a Hopf bifurcation, is not induced by the commensurability of the two cycle frequencies but rather by the disappearance of the weaker frequency oscillation. For even larger coupling the motion changes via a resonant heteroclinic bifurcation to a slowing-down state corresponding to a single attracting heteroclinic orbit. Coexistence of multiple attractors can be found for some parameter regions. These results are of interest in ecological, sociological, neuronal, and other dynamical systems, which have the structure of coupled heteroclinic cycles.
|Additional Information:||© 2012 American Physical Society. Received 6 July 2011; revised 28 November 2011; published 30 January 2012. The authors acknowledge Grigory Osipov for useful discussions. This work is supported in part by the National Natural Science Foundation of China, the 973 Program, the Foundation of Doctoral Training, and the Fundamental Research Funds for the Central Universities. M.C.C. thanks Beijing Normal University for support and hospitality during the initial stages of this work. C.Z. is supported by Hong Kong Baptist University.|
|Classification Code:||PACS: 05.45.Xt|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||13 Mar 2012 17:30|
|Last Modified:||26 Dec 2012 14:54|
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