Diffusion of Asymmetric Swimmers

Details Diffusion of Asymmetric Swimmers Diffusion of Asymmetric Swimmers

2003-02-19

arxiv.org/abs/cond-mat/0302387v1

Phys. Rev. Lett. vol.91, p.80601 (2003).

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures (first figure takes awhile to print)

Scientific paper

10.1103/PhysRevLett.91.080601

Particles moving along curved trajectories will diffuse if the curvature fluctuates sufficiently in either magnitude or orientation. We consider particles moving at a constant speed with either a fixed or with a Gaussian distributed curvature magnitude. At small speeds the diffusivity is independent of the speed. At larger particle speeds, the diffusivity depends on the speed through a novel exponent. We apply our results to intracellular transport of vesicles. In sharp contrast to thermal diffusion, the effective diffusivity increases with vesicle size and so may provide an effective means of intracellular transport.

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