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Isothermal ratchets: numerical study of the efficiency of the energy transduction

AuthorsSintes, Tomàs ; Sumithra, K.
KeywordsIsothermal ratchet
Efficiency optimization
[PACS] Fluctuation phenomena, random processes, and Brownian motion
[PACS] Nonequilibrium and irreversible thermodynamics
Issue Date24-Apr-2002
CitationComputer Physics Communications 147(1-2): 646-649 (2002)
AbstractThe energetics of isothermal ratchets, that are driven by an external force and operate in contact with a single heat bath, is studied by Langevin equation simulations. The system is analyzed in terms of the mass, friction and amplitude of the external forcing. We found a regime where the efficiency is optimized at finite temperatures, proving that thermal fluctuations facilitate the efficiency of the energy conversion. The condition of optimal efficiency is found, relating mass, temperature and friction to the properties of the ratchet potential.
Description4 pages, 4 figures.-- PACS nrs.: 05.40.+j; 05.70.Ln.-- Printed version published Aug 1, 2002.
Publisher version (URL)http://dx.doi.org/10.1016/S0010-4655(02)00360-0
Appears in Collections:(IFISC) Artículos
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