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:
影响因子:
--
通讯作者:
W. Horsthemke
中科院分区:
文献类型:
--
作者:
E. Zemskov;M. Tsyganov;W. Horsthemke
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.
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