A Langevin simulation for the Feynman ratchet model

被引：30

作者：

Sakaguchi, H ^{[1
]}

机构：

[1] Kyushu Univ, Fac Engn, Dept Appl Phys, Fukuoka 810, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 03期

关键词：

fluctuation; ratchet; Langevin equation; Carnot cycle;

D O I：

10.1143/JPSJ.67.709

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A Langevin equation is proposed to perform a simulation for the Feynman ratchet model. A stochastic boundary condition is introduced for the role of a pawl in the Feynman ratchet model. The mathematical model can be solved using the Fokker-Planck equation. The solution is compared with the Langevin simulation. A coupled system of the ratchet elements exhibits smooth unidirectional motion when the coupling constant is large.

引用

页码：709 / 712

页数：4

共 7 条

[1] FLUCTUATION DRIVEN RATCHETS - MOLECULAR MOTORS [J].

ASTUMIAN, RD ;

BIER, M .

PHYSICAL REVIEW LETTERS, 1994, 72 (11) :1766-1769

[2]

FEYNMAN RP, 1963, LECT PHYSICS

[3] COOPERATIVE MOLECULAR MOTORS [J].

JULICHER, F ;

PROST, J .

PHYSICAL REVIEW LETTERS, 1995, 75 (13) :2618-2621

[4] FORCED THERMAL RATCHETS [J].

MAGNASCO, MO .

PHYSICAL REVIEW LETTERS, 1993, 71 (10) :1477-1481

[5] Kinetic characterization of heat bath and the energetics of thermal ratchet models [J].

Sekimoto, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1997, 66 (05) :1234-1237

[6] THE MYOSIN STEP SIZE - MEASUREMENT OF THE UNIT DISPLACEMENT PER ATP HYDROLYZED IN AN INVITRO ASSAY [J].

TOYOSHIMA, YY ;

KRON, SJ ;

SPUDICH, JA .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1990, 87 (18) :7130-7134

[7]

Vale R D, 1990, Adv Biophys, V26, P97, DOI 10.1016/0065-227X(90)90009-I

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