Giant Colloidal Diffusivity on Corrugated Optical Vortices
Statistical Mechanics
2009-11-11 v1 Soft Condensed Matter
Abstract
A single colloidal sphere circulating around a periodically modulated optical vortex trap can enter a dynamical state in which it intermittently alternates between freely running around the ring-like optical vortex and becoming trapped in local potential energy minima. Velocity fluctuations in this randomly switching state still are characterized by a linear Einstein-like diffusion law, but with an effective diffusion coefficient that is enhanced by more than two orders of magnitude.
Cite
@article{arxiv.cond-mat/0603558,
title = {Giant Colloidal Diffusivity on Corrugated Optical Vortices},
author = {Sang-Hyuk Lee and David G. Grier},
journal= {arXiv preprint arXiv:cond-mat/0603558},
year = {2009}
}
Comments
4 pages, 4 figures