Transport of coupled particles in fractional feedback ratchet driven by Bounded noise

Yingxue Cui and Lijuan Ning

Physica A: Statistical Mechanics and its Applications, 2023, vol. 615, issue C

Abstract: In this paper, the transport of coupled particles in fractional feedback potential driven by two bounded noises is investigated. The mean velocity of coupled particles is calculated versus the fractional order, barrier height, noise intensity, coupling intensity and static length. The results suggest that compared with the integer order feedback potential, the fractional order situation can affect the switching frequency of the feedback potential, and thereby regulate the transport speed of coupled particles. Therefore, a new quantity Cf is specially introduced to quantify the feedback switch frequency. In addition, the superposition of bounded noises on the coupled particles will lead to the increase of mean velocity. It is worth noting that for a definite noise intensity, an optimal fractional order can be found to bring the particles reach the maximum velocity. Once the fractional order is greater than the optimal value, the mean velocity will drop sharply to near zero. Furthermore, our results also show that the optimal static length can increase the transport velocity when the coupling coefficient is properly selected. This can provide theoretical basis for the treatment of diseases caused by neurotransmitter transport disorder.

Keywords: Fractional order; Bounded noise; Feedback ratchet (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:615:y:2023:i:c:s0378437123001280

DOI: 10.1016/j.physa.2023.128573

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