Asymmetrical Diffusion-Induced Directional
Motion
BAO Jing-Dong;WANG Hai-Yan;SONG Yan-Li
【期刊名称】《理论物理通讯（英文版）》 【年(卷),期】2004(042)011
【摘要】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 \diffusion, numerical simulations for the average velocity of the particle in the presence of ballistic and normal diffusions support the present theoretical findings. 【总页数】4页(707-710)
【关键词】current;ratchet potential;Levy flights;ballistic diffusion 【作者】BAO Jing-Dong;WANG Hai-Yan;SONG Yan-Li
【作者单位】The Key Laboratory of Beam Technique and Material Modification of the Ministry of Education, Beijing Normal University, Beijing 100875, China;Department of Physics, Beijing Normal University,
Asymmetrical Diffusion-Induced Directional Motion
