Dynamics of a Brownian circle swimmer

Details Dynamics of a Brownian circle swimmer Dynamics of a Brownian circle swimmer

2008-03-13

arxiv.org/abs/0803.2008v2

Phys. Rev. E 78, 020101(R) (2008)

Physics

Condensed Matter

Soft Condensed Matter

v2: changed title from "The fate of a Brownian circle swimmer"; mainly changes of introduction and conclusions

Scientific paper

10.1103/PhysRevE.78.020101

Self-propelled particles move along circles rather than along a straight line when their driving force does not coincide with their propagation direction. Examples include confined bacteria and spermatozoa, catalytically driven nanorods, active, anisotropic colloidal particles and vibrated granulates. Using a non-Hamiltonian rate theory and computer simulations, we study the motion of a Brownian "circle swimmer" in a confining channel. A sliding mode close to the wall leads to a huge acceleration as compared to the bulk motion, which can further be enhanced by an optimal effective torque-to-force ratio.

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