Abstract
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 a stair-like motion oblique to the potential trenches. The crossover between these two regimes, as well as the deflection angle, depend 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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Bammert, J., Zimmermann, W. Dumbbell transport and deflection in a spatially periodic potential. Eur. Phys. J. E 28, 331–335 (2009). https://doi.org/10.1140/epje/i2008-10421-5
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DOI: https://doi.org/10.1140/epje/i2008-10421-5