arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0810.5612cond-mat.stat-mech
收藏

交流驱动布朗马达的Fokker-Planck处理

ac-driven Brownian motors: a Fokker-Planck treatment

S. Denisov, P. Hanggi, J. L. Mateos

摘要:

我们考虑交流驱动布朗电机的一个基本模型,即,置于时空周期势中并与热浴耦合的经典粒子。用含时的Fokker-Planck方程研究了涨落和耗散的影响。该方法允许我们将原始的随机问题映射到一个普通的线性代数方程组。该系统的解提供了棘轮输运的完整信息,避免了直接随机计算的长瞬态和大的统计起伏等缺点。福克-普朗克动力棘轮方法是有益的,并打开了进一步推广的空间。

英文摘要:

We consider a primary model of ac-driven Brownian motors, i.e., a classical particle placed in a spatial-time periodic potential and coupled to a heat bath. The effects of fluctuations and dissipations are studied by a time-dependent Fokker-Planck equation. The approach allows us to map the original stochastic problem onto a system of ordinary linear algebraic equations. The solution of the system provides complete information about ratchet transport, avoiding such disadvantages of direct stochastic calculations as long transients and large statistical fluctuations. The Fokker-Planck approach to dynamical ratchets is instructive and opens the space for further generalizations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑