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Efficiency optimization in a correlation ratchet with asymmetric unbiased fluctuations

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arxiv physics/0307012 v1 pith:4N74BXNQ submitted 2003-07-02 physics.bio-ph physics.gen-ph

Efficiency optimization in a correlation ratchet with asymmetric unbiased fluctuations

classification physics.bio-ph physics.gen-ph
keywords efficiencyfluctuationsasymmetricasymmetryfoundpotentialratchettemperature
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The efficiency of a Brownian particle moving in periodic potential in the presence of asymmetric unbiased fluctuations is investigated. We found that there is a regime where the efficiency can be a peaked function of temperature, which proves that thermal fluctuations facilitate the efficiency of energy transformation, contradicting the earlier findings (H. kamegawa et al. Phys. Rev. Lett. 80 (1998) 5251). It is also found that the mutual interplay between asymmetry of fluctuation and asymmetry of the potential may induce optimized efficiency at finite temperature. The ratchet is not most efficiency when it gives maximum current.

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