Optimal diffusive transport in a tilted periodic potential

被引：170

作者：

Lindner, B ^{[1
]}

Kostur, M ^{[1
]}

Schimansky-Geier, L ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany

来源：

FLUCTUATION AND NOISE LETTERS | 2001年 / 1卷 / 01期

关键词：

brownian motion; diffusion; periodic potentials; transport;

D O I：

10.1142/S0219477501000056

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

We study the diffusive motion of an overdamped Brownian particle in a tilted periodic potential. Mapping the continuous dynamics onto. a discrete cumulative process we find exact expressions for the diffusion coefficient and the Peclet number which characterize the transport. At a sufficiently strong but subcritical bias an optimized transport with respect to the noise strength is observed. These results are confirmed by numerical solution of the Fokker-Planck equation.

引用

页码：R25 / R39

页数：15

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