Effective surface motion on a reactive cylinder of particles that perform intermittent bulk diffusion

Details Effective surface motion on a reactive cylinder of particles that perform intermittent bulk diffusion Effective surface motion on a reactive cylinder of particles that perform intermittent bulk diffusion

2011-02-17

arxiv.org/abs/1102.3555v1

Physics

Condensed Matter

Statistical Mechanics

26 pages, 5 figures

Scientific paper

In many biological and small scale technological applications particles may transiently bind to a cylindrical surface. In between two binding events the particles diffuse in the bulk, thus producing an effective translation on the cylinder surface. We here derive the effective motion on the surface, allowing for additional diffusion on the cylinder surface itself. We find explicit solutions for the number of adsorbed particles at one given instant, the effective surface displacement, as well as the surface propagator. In particular sub- and superdiffusive regimes are found, as well as an effective stalling of diffusion visible as a plateau in the mean squared displacement. We also investigate the corresponding first passage and first return problems.

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