Journal
CHAOS SOLITONS & FRACTALS
Volume 114, Issue -, Pages 394-399Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chaos.2018.07.029
Keywords
Chimera; Spiral wave chimera; Fitzhugh-Nagumo oscillators
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Funding
- National Natural Science Foundation of China [11575036, 11505016]
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Spiral wave chimeras with spatially extended unsynchronized cores have been reported in nonlocally coupled phase oscillators and chaotic oscillators. Here, we investigate the two-dimensional nonlocally coupled FitzHugh-Nagumo oscillators with open boundary conditions. Rich dynamics of spiral wave chimeras is discovered numerically. Besides outwardly propagating and inwardly propagating single-spiral wave chimeras, we find the double-spiral wave chimera with two spiral chimeras rotating with each other and the breakup of spiral wave chimeras. We also find a transition between a normal spiral wave with a phase singularity at its center and spiral wave chimera. (C) 2018 Elsevier Ltd. All rights reserved.
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