2013年6月
Mechanism of spiral formation in heterogeneous discretized excitable media.
Physical review. E, Statistical, nonlinear, and soft matter physics
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- 巻
- 87
- 号
- 6
- 開始ページ
- 062815
- 終了ページ
- 062815
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevE.87.062815
Spiral waves on excitable media strongly influence the functions of living systems in both a positive and negative way. The spiral formation mechanism has thus been one of the major themes in the field of reaction-diffusion systems. Although the widely believed origin of spiral waves is the interaction of traveling waves, the heterogeneity of an excitable medium has recently been suggested as a probable cause. We suggest one possible origin of spiral waves using a Belousov-Zhabotinsky reaction and a discretized FitzHugh-Nagumo model. The heterogeneity of the reaction field is shown to stochastically generate unidirectional sites, which can induce spiral waves. Furthermore, we found that the spiral wave vanished with only a small reduction in the excitability of the reaction field. These results reveal a gentle approach for controlling the appearance of a spiral wave on an excitable medium.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevE.87.062815
- eISSN : 1550-2376
- PubMed ID : 23848737