PERIODICALLY ROCKED THERMAL RATCHETS

被引：425

作者：

BARTUSSEK, R

HANGGI, P

KISSNER, JG

机构：

[1] Institut für Theoretische Physik, Universität Augsburg, Augsburg, D-86135

来源：

EUROPHYSICS LETTERS | 1994年 / 28卷 / 07期

关键词：

D O I：

10.1209/0295-5075/28/7/001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider overdamped Brownian particles in anisotropic, periodic structures (ratchets) that are rocked periodically. Together with the periodic forcing, white thermal noise can generate a non-zero, macroscopic velocity. By tuning the parameters, the direction of the current can be reversed. Additionally, the current as a function of the driving amplitude exhibits several local maxima at finite driving frequencies. For zero thermal noise, the deterministic current assumes an intriguing structure, reflecting the complex dynamics of particle excursions along the ratchet.

引用

页码：459 / 464

页数：6

共 19 条

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