Dumbbell transport and deflection in a spatially periodic potential

Details Dumbbell transport and deflection in a spatially periodic potential Dumbbell transport and deflection in a spatially periodic potential

2009-03-13

arxiv.org/abs/0903.2371v1

Eur. Phys. J. E 28, 331-335 (2009)

Physics

Classical Physics

5 pages, 8 figures

Scientific paper

10.1140/epje/i2008-10421-5

We present theoretical results on the deterministic and stochastic motion of a dumbbell carried by a uniform flow through a three-dimensional spatially periodic potential. Depending on parameters like the flow velocity, there are two different kinds of movement: transport along a potential valley and stair-like motion oblique to the potential trenches. The crossover between these two regimes, as well as the deflection angle, depends on the size of the dumbbell. Moreover, thermal fluctuations cause a resonance-like variation in the deflection angle as a function of the dumbbell extension.

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