Abstract
The current of a loaded particle along a two-dimensional (2D) tube with non-straight midline and is investigated. It is found that in the case of a load with an asymmetric unbiased external force, the limits of temperature and asymmetric external force for particle directed moving become smaller as the load increased. The directed current is a peaked function of temperature and amplitude of the asymmetric unbiased external force. As the channel width is decreased, the directed current decreases with the increase of the load.
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