Spiral competition in three-component excitable media
Spiral competition in three-component excitable media
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DOI：
10.1103/physrevlett.76.1170
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发表时间：
1996-02-12
影响因子：
8.6
通讯作者：
Tsimring, L
中科院分区：
文献类型：
--
作者：
Aranson, I;Levine, H;Tsimring, L
在Dictyostebellamoeacum的聚集过程中观察到由大的相干螺旋组成的可激发波图案。这些从最初的无序状态出现，通过随机细胞放电产生。在这项工作中，我们表明，这种现象可以被理解为是由于一个特定的螺旋竞争不稳定性发生在某些三组分可激发介质模型。这种不稳定性可以理解为螺旋对的对称性破坏，导致一个螺旋抑制和排斥另一个螺旋。
Excitable wave patterns consisting of large coherent spirals are observed during the aggregation of Dictyostelium amoebae. These emerge from an initially disordered state which arises via random cell firing. In this work, we show that this phenomenon can be understood as being due to a specific spiral competition instability which occurs in certain three-component excitable medium models. This instability can be understood as symmetry breaking of a spiral pair leading to one spiral suppressing and expelling another.