Patterns of phase-dependent spiral wave attenuation in excitable media.
Patterns of phase-dependent spiral wave attenuation in excitable media.
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DOI：
10.1103/physreve.75.051923
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发表时间：
2007-05
期刊：
影响因子：
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通讯作者：
M. A. de la Casa;F. J. de la Rubia;P. Ivanov
中科院分区：
文献类型：
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作者：
M. A. de la Casa;F. J. de la Rubia;P. Ivanov
我们发现，引入周期性的平面前与长的激发持续时间可以导致螺旋衰减。衰减周期性地发生在几个平面前的周期，形成各种复杂的时空模式。我们发现，这些衰减模式只发生在特定阶段的下降前相对于旋转阶段的螺旋。这些模式分为两大类，每一类都由平面前每个周期的衰减螺旋数的特定表达式定义，并由参数空间中的结构图表示。我们观察到的螺旋衰减模式在时间上保持稳定，并且在系统的演化过程中不会发生变化。
We show that introducing periodic planar fronts with long excitation duration can lead to spiral attenuation. The attenuation occurs periodically over cycles of several planar fronts, forming a variety of complex spatiotemporal patterns. We find that these attenuation patterns occur only at specific phases of the descending fronts relative to the rotational phase of the spiral. These patterns fall into two general classes, each defined by a specific expression for the number of attenuated spirals per cycle of planar fronts, and represented by a structured diagram in parameter space. The spiral attenuation patterns we observe remain stable in time and do not change during the evolution of the system.