Dresden 2011 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 10: Posters I

DY 10.22: Poster

Montag, 14. März 2011, 17:00–19:00, P4

Anomalous diffusion of Brownian particals in potential traps exposed to shear flow — •Johannes Greber, Diego Kienle, Jochen Bammert, and Walter Zimmermann — Universität Bayreuth, LS für theoreitsche Physik I, 95440 Bayreuth

The Brownian motion of particles in various potential shapes is investigated. Depending on the local curvature of potentials with a single minimum, we find either sub- or super-diffusive particle dynamics. The dependence of the anomalous exponent of the mean square displacement on the on the potential shape is explored. In addition, we study also the impact of shear flow on the diffusive behavior of particles in potentials, as recently investigated for small excursions in Ref. [1]. In addition , we study the dynamics of particles in a double well-potential well, where the particles are exposed to shear flow. As well, we find a nonlinear shear rate dependence of the probability current across the potential.

[1] A. Ziehl et al., Phys. Rev. Lett. 103, 230602 (2009)