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arXiv 2104.09849cond-mat.softcond-mat.stat-mech
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主动物体的几何诱导校正

Geometry-induced rectification for an active object

Jae Sung Lee, Jong-Min Park, Jae Dong Noh, Hyunggyu Park

摘要:

活性粒子感应的整流电流由于可能应用于生物环境中的微电机而受到广泛关注。在许多主动粒子之间插入{ \em不对称}被动物体被认为是产生这种整流运动的基本成分。在这里,我们报告说,相反的情况也是可能的,其中一个主动物体的运动可以纠正其几何不对称性之间的许多被动粒子。这可以描述具有不对称形状的极性生物制剂的单向运动。我们还发现了一个弱的,但较少的扩散整流运动中的{ \em被动}模式没有能量泵入。这种“耗散运动”机制可以作为设计原理,用于开发更可靠的微电机。

英文摘要:

Study on a rectified current induced by active particles has received a great attention due to its possible application to a microscopic motor in biological environments. Insertion of an {\em asymmetric} passive object amid many active particles has been regarded as an essential ingredient for generating such a rectified motion. Here, we report that the reverse situation is also possible, where the motion of an active object can be rectified by its geometric asymmetry amid many passive particles. This may describe an unidirectional motion of polar biological agents with asymmetric shape. We also find a weak but less diffusive rectified motion in a {\em passive} mode without energy pump-in. This "moving by dissipation" mechanism could be used as a design principle for developing more reliable microscopic motors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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