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Spiral Wave Dynamics in a Response System Subjected to a Spiral Wave Forcing |
| LI Guang-Zhao, CHEN Yong-Qi, TANG Guo-Ning**, LIU Jun-Xian
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College of Physics and Technology, Guangxi Normal University, Guilin 541004
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| Cite this article: |
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LI Guang-Zhao, CHEN Yong-Qi, TANG Guo-Ning et al 2011 Chin. Phys. Lett. 28 020504 |
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Abstract Unidirectional linear error feedback coupling of two excitable medium systems displaying spiral waves is considered. The spiral wave in the response system is thus subjected to a spiral wave forcing. We find that the unidirectional feedback coupling can lead to richer behaviour than the mutual coupling. The spiral wave dynamics in the response system depends on the coupling strength and frequency mismatch. When the coupling strength is small, the feedback coupling induces the drift or meander of the forced spiral wave. When the coupling strength is large enough, the feedback coupling may lead to the transition from spiral wave to anti-target or target-like wave. The generation of anti-target wave in coupled excitable media is observed for the first time. Furthermore, when the coupling strength is strong, the synchronization between two subsystems can be established.
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| Keywords:
05.10.-a
05.45.-a
82.40.CK
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Received: 14 September 2010
Published: 30 January 2011
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| PACS: |
05.10.-a
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(Computational methods in statistical physics and nonlinear dynamics)
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05.45.-a
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(Nonlinear dynamics and chaos)
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82.40.Ck
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(Pattern formation in reactions with diffusion, flow and heat transfer)
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