中国物理B ›› 2010, Vol. 19 ›› Issue (5): 50513-050513.doi: 10.1088/1674-1056/19/5/050513

• GENERAL • 上一篇    下一篇

Doppler instability of antispiral waves in discrete oscillatory reaction-diffusion media

钱郁, 黄晓东, 廖旭红, 胡岗   

  1. Department of Physics, Beijing Normal University, Beijing 100875, China
  • 收稿日期:2009-09-22 修回日期:2009-10-20 出版日期:2010-05-15 发布日期:2010-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No.~10675020) and by the National Basic Research Program of China (973 Program) (Grant No.~2007CB814800).

Doppler instability of antispiral waves in discrete oscillatory reaction-diffusion media

Qian Yu(钱郁), Huang Xiao-Dong(黄晓东), Liao Xu-Hong(廖旭红), and Hu Gang(胡岗)   

  1. Department of Physics, Beijing Normal University, Beijing 100875, China
  • Received:2009-09-22 Revised:2009-10-20 Online:2010-05-15 Published:2010-05-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No.~10675020) and by the National Basic Research Program of China (973 Program) (Grant No.~2007CB814800).

摘要: This paper investigates antispiral wave breakup phenomena in coupled two-dimensional FitzHugh--Nagumo cells with self-sustained oscillation via Hopf bifurcation. When the coupling strength of the active variable decreases to a critical value, wave breakup phenomenon first occurs in the antispiral core region where waves collide with each other and spontaneously break into spatiotemporal turbulence. Measurements reveal for the first time that this breakup phenomenon is due to the mechanism of antispiral Doppler instability.

Abstract: This paper investigates antispiral wave breakup phenomena in coupled two-dimensional FitzHugh--Nagumo cells with self-sustained oscillation via Hopf bifurcation. When the coupling strength of the active variable decreases to a critical value, wave breakup phenomenon first occurs in the antispiral core region where waves collide with each other and spontaneously break into spatiotemporal turbulence. Measurements reveal for the first time that this breakup phenomenon is due to the mechanism of antispiral Doppler instability.

Key words: antispiral waves, break up, Doppler instability

中图分类号:  (Cell locomotion, chemotaxis)

  • 87.17.Jj
87.15.R- (Reactions and kinetics) 87.18.Hf (Spatiotemporal pattern formation in cellular populations)