Title:
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Tight coupling in thermal Brownian motors
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Author:
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Gómez Marín, Alejandro; Sancho, José M.
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Other authors:
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Universitat de Barcelona |
Abstract:
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We study analytically a thermal Brownian motor model and calculate exactly the Onsager coefficients. We show how the reciprocity relation holds and that the determinant of the Onsager matrix vanishes. Such a condition implies that the device is built with tight coupling. This explains why Carnot¿s efficiency can be achieved in the limit of infinitely slow velocities. We also prove that the efficiency at maximum power has the maximum possible value, which corresponds to the Curzon-Alhborn bound. Finally, we discuss the model acting as a Brownian refrigerator. |
Subject(s):
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-Fluctuacions (Física) -Processos de moviment brownià -Processos irreversibles -Termodinàmica del desequilibri -Fluctuations (Physics) -Brownian motion processes -Irreversible processes -Nonequilibrium thermodynamics |
Rights:
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(c) The American Physical Society, 2006
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Document type:
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Article Article - Published version |
Published by:
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The American Physical Society
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