NONQUASILINEAR DIFFUSION FAR FROM THE CHAOTIC THRESHOLD

被引：70
作者：
CARY, JR
ESCANDE, DF
VERGA, AD
机构：
[1] UNIV COLORADO,DEPT ASTROPHYS PLANETARY & ATMOSPHER SCI,BOULDER,CO 80309
[2] UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309
来源：
PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.65.3132
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The diffusion coefficient for particles in a field of randomly phased waves was calculated numerically. Spectra broad in wave number and broad in frequency exhibit identical behavior for the diffusion coefficient as a function of the overlap parameter. The diffusion coefficient exceeds the quasilinear value by a factor of about 2.5 at near 18. Differences greater than 25% between the two values exist far above the chaotic threshold (60). A mapping-based model with a small number of random phases qualitatively reproduces the results of the simulations. © 1990 The American Physical Society.
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页码：3132 / 3135
页数：4
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