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  1. 1 Open Physics

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  1. 1 2009

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  1. 1 Ai B.-q.

  2. 1 Liu Y.

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Brownian pump with an unbiased external force

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Liu Y., Ai B.-q.
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We investigate Brownian pump transport in the presence of an unbiased external force. The pumping system is embedded in a finite region bounded by two particle reservoirs. In the adiabatic limit, we obtain the analytical expressions of the current and the concentration ratio. We find that Brownian particles can be pumped through an asymmetric potential from a particle reservoir at low concentration to one at the same or higher concentration in the presence of an unbiased external force.
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