Fluctuation on Brownian motor in the presence of entropic barrier

被引：6

作者：

Xie, Hui-Zhang ^{[1
,2
]}

Ai, Bao-Quan ^{[3
]}

Liu, Xue-Mei ^{[1
,2
]}

Liu, Liang-Gang ^{[4
]}

Li, Zhi-Bing ^{[1
]}

机构：

[1] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

[2] S China Univ Technol, Dept Phys, Guangzhou 510640, Peoples R China

[3] S China Normal Univ, Sch Phys & Telecommun Engn, Inst Condensed Matter Phys, Guangzhou 510006, Guangdong, Peoples R China

[4] Macau Univ Sci & Technol, Fac Informat Technol, Taipa 999078, Macau, Peoples R China

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2009年 / 388卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Brownian motor; Entropic barriers; Fluctuation; Average velocity; TRANSPORT; DIFFUSION; RATCHET;

D O I：

10.1016/j.physa.2009.02.008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transporting velocity of a loaded Brownian motor with entropic barrier is investigated in the presence of an asymmetric unbiased force. It is found that in the presence of the entropic barrier, the stall force of the Brownian motor does not change monotonously with temperature. The average velocity of the Brownian motor is a peaked function of thermal noise and amplitude of the asymmetric unbiased external force, which indicates that a definite fluctuation can facilitate the loaded Brownian motor moving. With the increase of the load, the range of temperature and amplitude of the asymmetric unbiased external force for Brownian motor working become smaller. The limited area for Brownian motor working is given oil the load-temperature plane. The threshold of fluctuation for Brownian motor working is found, and the minimum of asymmetric parameter of unbiased external force for Brownian motor working is given. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2093 / 2098

页数：6

共 19 条

[1] Current in a three-dimensional periodic tube with unbiased forces [J].

Ai, Bao-quan ;

Liu, Liang-gang .

PHYSICAL REVIEW E, 2006, 74 (05)

[2] Thermal noise can facilitate energy transformation in the presence of entropic barriers [J].

Ai, Bao-quan ;

Xie, Hui-zhang ;

Liu, Liang-gang .

PHYSICAL REVIEW E, 2007, 75 (06)

[3] Fluctuation driven transport and models of molecular motors and pumps [J].

Astumian, RD ;

Derényi, I .

EUROPEAN BIOPHYSICS JOURNAL WITH BIOPHYSICS LETTERS, 1998, 27 (05) :474-489

[4] Brownian motors [J].

Astumian, RD ;

Hänggi, P .

PHYSICS TODAY, 2002, 55 (11) :33-39

[5] Biased diffusion in confined media:: Test of the Fick-Jacobs approximation and validity criteria [J].

Burada, P. S. ;

Schmid, G. ;

Reguera, D. ;

Rubi, J. M. ;

Haenggi, P. .

PHYSICAL REVIEW E, 2007, 75 (05)

[6] Diffusion in Confined Geometries [J].

Burada, P. Sekhar ;

Haenggi, Peter ;

Marchesoni, Fabio ;

Schmid, Gerhard ;

Talkner, Peter .

CHEMPHYSCHEM, 2009, 10 (01) :45-54

[7] Asymmetric kinks: Stabilization by entropic forces [J].

Costantini, G ;

Marchesoni, F .

PHYSICAL REVIEW LETTERS, 2001, 87 (11) :art. no.-114102

[8] Artificial Brownian motors: Controlling transport on the nanoscale [J].

Haenggi, Peter ;

Marchesoni, Fabio .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :387-442

[9] Brownian motors [J].

Hänggi, P ;

Marchesoni, F ;

Nori, F .

ANNALEN DER PHYSIK, 2005, 14 (1-3) :51-70

[10] Energetics of a forced thermal ratchet [J].

Kamegawa, H ;

Hondou, T ;

Takagi, F .

PHYSICAL REVIEW LETTERS, 1998, 80 (24) :5251-5254

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