光学摇摆棘轮的动力学分析：理论与实验
Dynamical analysis of an optical rocking ratchet: Theory and experiment
摘要：
对确定性光学摇摆棘轮的动力学进行了深入的分析。V. Arzola等人，物理修订信函106，168104（2011）），并与实验结果进行了比较。所研究的系统由一个微观粒子与一个周期性和不对称的光图案相互作用组成，该光图案通过一个无偏的时间周期性外力被驱离平衡。结果表明，有效光学势的不对称性取决于相对于空间周期的粒子的相对大小，这是分析作为一个有效的机制，粒子分馏。详细讨论了在确定性区域中获得电流反转的必要条件。
英文摘要：
A thorough analysis of the dynamics in a deterministic optical rocking ratchet (introduced in A. V. Arzola et al., Phys. Rev. Lett. 106, 168104 (2011)) and a comparison with experimental results are presented. The studied system consists of a microscopic particle interacting with a periodic and asymmetric light pattern, which is driven away from equilibrium by means of an unbiased time- periodic external force. It is shown that the asymmetry of the effective optical potential depends on the relative size of the particle with respect to the spatial period, and this is analyzed as an effective mechanism for particle fractionation. The necessary conditions to obtain current reversals in the deterministic regime are discussed in detail.
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