时空调制引起的漫游螺旋波与旅行螺旋波共存现象
Spatiotemporal modulation induced coexistence of meandering spiral wave and travelling spiral wave?
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摘要: 以Barkley模型为研究对象,研究了在时空调制作用下螺旋波时空动力学行为特性.发现在适当的调制参数的作用下,能够在同一系统中同时观察到漫游螺旋波与旅行螺旋波.通过数值模拟研究分析,给出了能产生漫游螺旋波与旅行螺旋波共存现象的潜在机理,并详细讨论了在Barkley模型中要产生这种共存现象的两个必要条件.Abstract: Spiral dynamics induced by spatiotemporal modulation is investigated in the generic excitable Barkley model. The coexistence of meandering spiral wave and travelling spiral wave in the same medium is discovered under proper spatiotemporal modulation. The underlying mechanism behind this coexistence phenomenon is analyzed. And the two necessary conditions which are needed to observe the coexistence of meandering spiral wave and travelling spiral wave in the excitable Barkley model are discussed.
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