Ratchet, pawl and spring Brownian motor

Details Ratchet, pawl and spring Brownian motor Ratchet, pawl and spring Brownian motor

2005-06-21

arxiv.org/abs/cond-mat/0506543v1

Physica D 216 (2006) 214-219

Physics

Condensed Matter

Other Condensed Matter

Submitted to Physica D

Scientific paper

10.1016/j.physd.2005.12.015

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 temperatures of the baths. Such theoretical predictions and the results from numerical simulations agree within the ranges of the approximations performed.

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