Oscillatory pulses and wave trains in a bistable reaction-diffusion system with cross diffusion.

Oscillatory pulses and wave trains in a bistable reaction-diffusion system with cross diffusion.
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具有交叉扩散的双稳态反应扩散系统中的振荡脉冲和波列。

DOI:
10.1103/physreve.95.012203
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发表时间:
2017
期刊:
Physical review. E
影响因子:
--
通讯作者:
W. Horsthemke
W. Horsthemke
中科院分区:
--
文献类型:
--
作者:
E. Zemskov;M. Tsyganov;W. Horsthemke

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我们研究具有线性交叉扩散的反应扩散系统中具有指数衰减振荡尾部的波。具体来说,我们考虑 FitzHugh-Nagumo 模型(也称为 Bonhoeffer-van der Pol 模型)的分段线性近似。我们关注两种类型的行波,即对应于同宿解的孤立脉冲,以及脉冲或波列序列,即周期解。分析了交叉扩散对波剖面和传播速度的影响。我们发现了一个有趣的结果,即在双稳态交叉扩散 FitzHugh-Nagumo 系统中同时出现脉冲和波列,而在没有交叉扩散的标准双稳态系统中仅存在前沿。
We study waves with exponentially decaying oscillatory tails in a reaction-diffusion system with linear cross diffusion. To be specific, we consider a piecewise linear approximation of the FitzHugh-Nagumo model, also known as the Bonhoeffer-van der Pol model. We focus on two types of traveling waves, namely solitary pulses that correspond to a homoclinic solution, and sequences of pulses or wave trains, i.e., a periodic solution. The effect of cross diffusion on wave profiles and speed of propagation is analyzed. We find the intriguing result that both pulses and wave trains occur in the bistable cross-diffusive FitzHugh-Nagumo system, whereas only fronts exist in the standard bistable system without cross diffusion.
双曲 FitzHugh-Nagumo 系统中的波阵面和交叉扩散的影响。
DOI: --
发表时间: 2015
期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子: --
作者:
E. Zemskov;M. Tsyganov;W. Horsthemke
通讯作者: W. Horsthemke