Enhanced Diffusion of a Needle in a Planar Course of Point Obstacles

Simple item page
dc.creatorHöfling, Felix
dc.creatorFrey, Erwin
dc.creatorFranosch, Thomas
dc.date2008-06-06
dc.date2008-08-26
dc.date.accessioned2026-07-07T10:03:55Z
dc.date.available2026-07-07T10:03:55Z
dc.descriptionThe transport of an infinitely thin, hard rod in a random, dense array of point obstacles is investigated by molecular dynamics simulations. Our model mimics the sterically hindered dynamics in dense needle liquids. The center-of-mass diffusion exhibits a minimum, and transport becomes increasingly fast at higher densities. The diffusion coefficient diverges according to a power law in the density with an approximate exponent of 0.8. This observation is connected with a new divergent time scale, reflected in a zig-zag motion of the needle, a two-step decay of the velocity-autocorrelation function, and a negative plateau in the non-Gaussian parameter.
dc.descriptionaccepted for publication in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/0806.1138
dc.identifierhttp://arxiv.org/abs/0806.1138
dc.identifierPhys. Rev. Lett. 101, 120605 (2008)
dc.identifierdoi:10.1103/PhysRevLett.101.120605
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/169474
dc.subjectStatistical Mechanics
dc.subjectSoft Condensed Matter
dc.titleEnhanced Diffusion of a Needle in a Planar Course of Point Obstacles
dc.typetext

Files

Collections

arXiv