Reversible Transport of Interacting Brownian Ratchets

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dc.creatorda Silva, Rogério M.
dc.creatorSilva, Clécio C. de Souza
dc.creatorCoutinho, Sérgio
dc.date2008-12-30
dc.date.accessioned2026-07-07T12:23:13Z
dc.date.available2026-07-07T12:23:13Z
dc.descriptionThe transport of interacting Brownian particles in a periodic asymmetric (ratchet) substrate is studied numerically. In a zero-temperature regime, the system behaves as a reversible step motor, undergoing multiple sign reversals of the particle current as any of the following parameters are varied: the pinning potential parameters, the particle occupation number, and the excitation amplitude. The reversals are induced by successive changes in the symmetry of the effective ratchet potential produced by the substrate and the fraction of particles which are effectively pinned. At high temperatures and low frequencies, thermal noise assists delocalization of the pinned particles, rendering the system to recover net motion along the gentler direction of the substrate potential. The joint effect of high temperature and high frequency, on the other hand, induces an additional current inversion, this time favoring motion along the direction where the ratchet potential is steeper. The dependence of these properties on the ratchet parameters and particle density is analyzed in detail.
dc.description8 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/0812.5071
dc.identifierhttp://arxiv.org/abs/0812.5071
dc.identifierPhys. Rev. E 78, 061131 (2008)
dc.identifierdoi:10.1103/PhysRevE.78.061131
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/213910
dc.subjectStatistical Mechanics
dc.subjectSuperconductivity
dc.titleReversible Transport of Interacting Brownian Ratchets
dc.typetext

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