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2006

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/18767

Tight coupling in thermal Brownian motors

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http://dx.doi.org/10.1103/PhysRevE.74.062102

Abstract

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

Fluctuacions (Física), Processos de moviment brownià, Processos irreversibles, Termodinàmica del desequilibri

Subject (English)

Fluctuations (Physics), Brownian motion processes, Irreversible processes, Nonequilibrium thermodynamics

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citation

GÓMEZ MARÍN, Alejandro and SANCHO, José M. Tight coupling in thermal Brownian motors. Physical Review E. 2006. Vol. 74, num. 062102-062102. ISSN 1063-651X. [consulted: 10 of June of 2026]. Available at: https://hdl.handle.net/2445/18767

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