Abstract
A version of a Brownian motor (system generating a unidirectional motion of a Brownian particle in an asymmetric fluctuating potential) is considered for the case where the potential consists of an asymmetric periodic component undergoing random shifts by a half-period L with a certain frequency and the potential of an external force F. The high efficiency of such a motor (ratio of the useful work against the load force F to the energy imparted to the particle due to the potential shifts) is due to a high and narrow barrier, as well as to a smooth arbitrarily shaped potential relief repeated with an energy shift on both half-periods L. Simple analytic expressions are obtained for the flux and efficiency as functions of the load force over a wide frequency range.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 79, No. 8, 2004, pp. 475–479.
Original Russian Text Copyright © 2004 by Rozenbaum.
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Rozenbaum, V.M. Mechanism for the appearance of a high-efficiency Brownian motor with fluctuating potential. Jetp Lett. 79, 388–391 (2004). https://doi.org/10.1134/1.1772438
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DOI: https://doi.org/10.1134/1.1772438