Tunable pinning of burst waves in extended systems with discrete sources

被引:42
作者
Mitkov, I [1 ]
Kladko, K
Pearson, JE
机构
[1] Univ Calif Los Alamos Natl Lab, Ctr Nonlinear Studies, Computat Sci Methods Grp, Los Alamos, NM 87545 USA
[2] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
关键词
D O I
10.1103/PhysRevLett.81.5453
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We study the dynamics of waves in a system of diffusively coupled discrete nonlinear sources. We show that the system exhibits burst waves which are periodic in a traveling-wave reference frame. We demonstrate that the burst waves are pinned if the diffusive coupling is below a critical value. When the coupling crosses the critical value the system undergoes a depinning instability via a saddle-node bifur cation, and the wave begins to move. We obtain the universal scaling for the mean wave velocity just above threshold. [S0031-9007(98)07893-4].
引用
收藏
页码:5453 / 5456
页数:4
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