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DY: Fachverband Dynamik und Statistische Physik

DY 1: Statistical Physics of Biological Systems I (with BP, talks from DY)

DY 1.13: Vortrag

Montag, 26. März 2012, 12:45–13:00, MA 001

Active microswimmers with spatially varying self-propulsion — •Aljoscha Hahn¹, Giovanni Volpe^2,3, Clemens Bechinger^2,3, and Holger Stark¹ — ¹Technische Universität Berlin, Germany — ²Max-Planck-Institut für intelligente Systeme, Stuttgart, Germany — ³Universität Stuttgart, Germany

The statistical physics of active microswimmers, which are capable of propelling themselves through a viscous environment, is intensively investigated at the present time. Recently, Janus particles were studied in a subcritical mixture [1] and it was found that the speed of self-propulsion can be controlled by the strength of illumination. In particular, a spatially varying light intensity induces a spatially varying self-propulsion. Based on the Smoluchowski equation, we study how active particles with a position dependent swimming speed behave and speculate about a novel type of ratchet.

[1] G. Volpe et al, Soft Matter 7, 8810 (2011)