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<p>In this work, we investigate the transport characteristics of an active Brownian particle in a piecewise linear ratchet potential, driven by a time-dependent self-propulsion&#xa0;velocity, through simulations of the overdamped Langevin equation. We observe optimal values of various parameters, such as the self-propelled velocity, the translation and rotational diffusion coefficients, and the asymmetry of the potential, at which the current attains a maximum. The mutual interplay of various parameters can induce currents in opposite directions. As a result, our model exhibits one or even two current reversals as a function of these parameters. showing that it can work as an effective particle separation device. In the considered parameter regimes, the motor exhibits a low transport coherence.</p>

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Transport and current reversal in an Active Brownian ratchet driven by a time-dependent self-propulsion velocity

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Ronald Benjamin

摘要

In this work, we investigate the transport characteristics of an active Brownian particle in a piecewise linear ratchet potential, driven by a time-dependent self-propulsion velocity, through simulations of the overdamped Langevin equation. We observe optimal values of various parameters, such as the self-propelled velocity, the translation and rotational diffusion coefficients, and the asymmetry of the potential, at which the current attains a maximum. The mutual interplay of various parameters can induce currents in opposite directions. As a result, our model exhibits one or even two current reversals as a function of these parameters. showing that it can work as an effective particle separation device. In the considered parameter regimes, the motor exhibits a low transport coherence.