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Effects of Periodic Forcing Amplitude on the Spiral Wave Resonance Drift |
| WU Ning-Jie;LI Bing-Wei;YING He-Ping |
| Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027 |
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| Cite this article: |
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WU Ning-Jie, LI Bing-Wei, YING He-Ping 2006 Chin. Phys. Lett. 23 2030-2033 |
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Abstract We study dynamics of spiral waves under a uniform periodic temporal forcing in an excitable medium. With a specific combination of frequency and amplitude of the external periodic forcing, a resonance drift of a spiral wave occurs along a straight line, and it is accompanied by a complicated `flower-like’ motion on each side of this bifurcate boundary line. It is confirmed that the straight-line drift frequency of spiral waves is not locked to the nature rotation frequency as the forcing amplitude expends the range of the spiral wave frequency. These results are further verified numerically for a simplified kinematical model.
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| Keywords:
05.45.Vx
05.45.-a
47.54.-r
82.40.Ck
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Published: 01 August 2006
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| PACS: |
05.45.Vx
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(Communication using chaos)
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05.45.-a
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(Nonlinear dynamics and chaos)
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47.54.-r
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(Pattern selection; pattern formation)
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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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