Asymmetrical Diffusion-Induced Directional Motion |
| |
Authors: | BAO Jing-Dong WANG Hai-Yan SONG Yan-Li |
| |
Institution: | 1. The Key Laboratory of Beam Technique and Material Modification
of the Ministry of Education, Beijing Normal University, Beijing 100875, China
;2. Department of Physics, Beijing Normal University, Beijing
100875, China |
| |
Abstract: | Competition between anomalous diffusion and normal diffusion
along two different directions of the
track for a Brownian motor, combined with a periodic potential
flashing, can lead to a macroscopic motion. The current is
calculated analytically by using the Astumian-Bier's approach of
the step number per cycle.
It is shown that the direction of current occurs reversal for
different waiting times of the potential off and the magnitude of
current is prominently enhanced. Moreover,
a thermal ``green" noise is
proposed to produce the ballistic diffusion, numerical simulations
for the average velocity of the particle in the presence of
ballistic and normal diffusions support the present theoretical findings. |
| |
Keywords: | current ratchet potential Levy flights ballistic diffusion |
本文献已被 维普 等数据库收录! |
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|