A Granular Brownian Ratchet Model

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dc.creatorCostantini, Giulio
dc.creatorMarconi, Umberto Marini Bettolo
dc.creatorPuglisi, Andrea
dc.date2006-11-06
dc.date.accessioned2026-07-07T08:18:36Z
dc.date.available2026-07-07T08:18:36Z
dc.descriptionWe show by numerical simulations that a non rotationally symmetric body, whose orientation is fixed and whose center of mass can only slide along a rectilinear guide, under the effect of inelastic collisions with a surrounding gas of particles, displays directed motion. We present a theory which explains how the lack of time reversal induced by the inelasticity of collisions can be exploited to generate a steady average drift. In the limit of an heavy ratchet, we derive an effective Langevin equation whose parameters depend on the microscopic properties of the system and obtain a fairly good quantitative agreement between the theoretical predictions and simulations concerning mobility, diffusivity and average velocity.
dc.description4 pages, 4 figures, submitted for publication
dc.identifierhttps://arxiv.org/abs/cond-mat/0611140
dc.identifierhttp://arxiv.org/abs/cond-mat/0611140
dc.identifierPhys. Rev. E 75, 061124 (2007)
dc.identifierdoi:10.1103/PhysRevE.75.061124
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134488
dc.subjectStatistical Mechanics
dc.subjectSoft Condensed Matter
dc.titleA Granular Brownian Ratchet Model
dc.typetext

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