Brownian motors: current fluctuations and rectification efficiency

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dc.creatorMachura, L.
dc.creatorKostur, M.
dc.creatorTalkner, P.
dc.creatorLuczka, J.
dc.creatorMarchesoni, F.
dc.creatorHanggi, P.
dc.date2004-09-13
dc.date.accessioned2026-07-07T06:23:13Z
dc.date.available2026-07-07T06:23:13Z
dc.descriptionWith this work we investigate an often neglected aspect of Brownian motor transport: The rôle of fluctuations of the noise-induced current and its consequences for the efficiency of rectifying noise. In doing so, we consider a Brownian inertial motor that is driven by an unbiased monochromatic, time-periodic force and thermal noise. Typically, we find that the asymptotic, time- and noise-averaged transport velocities are small, possessing rather broad velocity fluctuations. This implies a corresponding poor performance for the rectification power. However, for tailored profiles of the ratchet potential and appropriate drive parameters, we can identify a drastic enhancement of the rectification efficiency. This regime is marked by persistent, uni-directional motion of the Brownian motor with few back-turns, only. The corresponding asymmetric velocity distribution is then rather narrow, with a support that predominantly favors only one sign for the velocity.
dc.description9 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0409314
dc.identifierhttp://arxiv.org/abs/cond-mat/0409314
dc.identifierPhys. Rev. E 70, 061105 (2004)
dc.identifierdoi:10.1103/PhysRevE.70.061105
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96156
dc.subjectStatistical Mechanics
dc.subjectSoft Condensed Matter
dc.titleBrownian motors: current fluctuations and rectification efficiency
dc.typetext

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