Crossover from dispersive to regular transport in biased maps

被引:50
作者
Barkai, E [1 ]
Klafter, J [1 ]
机构
[1] TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,IL-69978 TEL AVIV,ISRAEL
关键词
D O I
10.1103/PhysRevLett.79.2245
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We investigate the influence of a weak uniform field epsilon on chaotic maps which in the absence of the field, generate subdiffusion. The field breaks the symmetry of the maps and leads to a net drift. A crossover from an anomalous type of motion, valid at short times, to a normal behavior, at long times is found for any finite field. The diffusion coefficient behaves as D(epsilon) similar to epsilon(gamma) where gamma depends on a single parameter of the map.
引用
收藏
页码:2245 / 2248
页数:4
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