Transport and Fractionation in Periodic Potential-Energy Landscapes

Details Transport and Fractionation in Periodic Potential-Energy Landscapes Transport and Fractionation in Periodic Potential-Energy Landscapes

2004-04-09

arxiv.org/abs/cond-mat/0404242v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages, 6 figures, RevTeX4

Scientific paper

Objects driven through periodically modulated potential-energy landscapes in two dimensions can become locked in to symmetry-selected directions that are independent of the driving force's orientation. We investigate this problem in the overdamped limit, and demonstrate that the crossover from free-flowing to locked-in transport can depend exponentially on an object's size, with this exceptional selectivity emerging from the periodicity of the environment.

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