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Controlling ratchet transport via a finite kicked environment

机译:通过有限的踢打环境控制棘轮运输

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摘要

We study the effects of a finite kicked environment (bath) composed of N harmonic oscillators on the particle transport in a weakly dissipative quasisymmetric potential system. The small spatial asymmetry is responsible for the appearance of directed particle transport without a net bias, known as the ratchet transport. The whole dynamics is governed by a generalized map where dissipation in the system emerges due to its interaction with the kicked environment. Distinct spectral densities are imposed to the bath oscillators and play an essential role in such models. By changing the functional form of the spectral density, we observe that the transport can be optimized or even suppressed. We show evidences that the transport optimization is related to stability properties of periodic points of the ratchet system and depends on the bath temperature. In a Markovian approach, transport can be increased or suppressed depending on the bath influence.
机译:我们研究了由N次谐波振荡器组成的有限踢环境(浴)对弱耗散准对称电势系统中粒子传输的影响。小的空间不对称是导致定向粒子传输而没有净偏差(称为棘轮传输)的原因。整体动力学由广义图控制,该图中由于与踢脚环境的相互作用而出现系统耗散。浴振荡器具有不同的光谱密度,并且在此类模型中起着至关重要的作用。通过改变光谱密度的函数形式,我们观察到可以优化甚至抑制传输。我们显示出证据,运输优化与棘轮系统的周期点的稳定性有关,并取决于浴温。在马尔可夫方法中,取决于镀液的影响,可以增加或抑制输送。

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