2026-04-13T13:30:39Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/187672025-12-05T16:45:50Zcom_2072_1057col_2072_478823col_2072_478917

Tight coupling in thermal Brownian motors Gómez Marín, Alejandro Sancho, José M. Fluctuacions (Física) Processos de moviment brownià Processos irreversibles Termodinàmica del desequilibri Fluctuations (Physics) Brownian motion processes Irreversible processes Nonequilibrium thermodynamics 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. 2011-07-07T12:52:14Z 2011-07-07T12:52:14Z 2006 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.74.062102 Physical Review E, 2006, vol. 74, p. 062102-062102 http://dx.doi.org/10.1103/PhysRevE.74.062102 (c) The American Physical Society, 2006 info:eu-repo/semantics/openAccess The American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)