منابع مشابه
Computer simulation of Feynman's ratchet and pawl system.
In this work, we introduce two models of Feynman's ratchet and pawl system. Molecular dynamics is carried out to simulate the two designs for Feynman's ratchet and pawl systems followed by a Langevin dynamics simulation of the reduced system. We find that the ratchet will rotate as designed when the temperature of the pawl chamber is lower than that of the ratchet chamber, which is consistent w...
متن کاملFeynman's ratchet and pawl: an exactly solvable model.
We introduce a simple, discrete model of Feynman's ratchet and pawl, operating between two heat reservoirs. We solve exactly for the steady-state directed motion and heat flows produced, first in the absence and then in the presence of an external load. We show that the model can act both as a heat engine and as a refrigerator. We finally investigate the behavior of the system near equilibrium,...
متن کاملPlasmonic Brownian ratchet
Paloma A. Huidobro,1,* Sadao Ota,2,* Xiaodong Yang,3 Xiaobo Yin,2,4 F. J. Garcia-Vidal,1,† and Xiang Zhang2,4,‡ 1Departamento de Fisica Teorica de la Materia Condensada and Condensed Matter Physics Center (IFIMAC), Universidad Autonoma de Madrid, 28049 Madrid, Spain 2National Science Foundation Nanoscale Science and Engineering Center, 3112 Etcheverry Hall, University of California at Berkeley,...
متن کاملMicromachined Linear Brownian Motor: Transportation of Nanobeads by Brownian Motion Using Three-Phase Dielectrophoretic Ratchet
Nanosystems operating in liquid media may suffer from random Brownian motion due to thermal fluctuations. Biomolecular motors exploit these random fluctuations to generate a controllable directed movement. Inspired by nature, we proposed and realized a nano-system based on Brownian motion of nanobeads for linear transport in microfluidic channels. The channels limit the degree-of-freedom of the...
متن کاملX iv : c on d - m at / 0 50 65 43 v 1 [ co nd - m at . o th er ] 2 1 Ju n 20 05 Ratchet , Pawl and Spring Brownian Motor
We present a model for a thermal Brownian motor based on Feynman’s famous ratchet and pawl device. Its main feature is that the ratchet and the pawl are in different thermal baths and connected by an harmonic spring. We simulate its dynamics, explore its main features and also derive an approximate analytical solution for the mean velocity as a function of the external torque applied and the te...
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ژورنال
عنوان ژورنال: Physica D: Nonlinear Phenomena
سال: 2006
ISSN: 0167-2789
DOI: 10.1016/j.physd.2005.12.015