Transport properties of active Brownian particles in a modified energy-depot model driven by correlated noises

Lin Guan, Yuwen Fang, Kongzhai Li, Chunhua Zeng and Fengzao Yang

Physica A: Statistical Mechanics and its Applications, 2018, vol. 505, issue C, 716-728

Abstract: In this paper, we investigate the role of correlated multiplicative (κ1) and additive (κ2) noises in a modified energy conversion depot model, at which it is added a linear term in the conversion of internal energy of active Brownian particles (ABPs). The linear term (a1≠0.0) in energy conversion model breaks the symmetry of the potential to generate motion of the ABPs with a net transport velocity. Adopt a nonlinear Langevin approach, the transport properties of the ABPs have been discussed, and our results show that: (i) the transport velocity 〈υ1〉 of the ABPs are always positive whether the correlation intensity λ=0.0 or not; (ii) for a small value of the multiplicative noise intensity κ1, the variation of 〈υ1〉 with λ shows a minimum, there exists an optimal value of the correlation intensity λ at which the 〈υ1〉 of the ABPs is minimized. But for a large value of κ1, the 〈υ1〉 monotonically decreases; (iii) the transport velocity 〈υ1〉 increases with the increase of the κ1 or κ2, i.e., the multiplicative or additive noise can facilitate the transport of the ABPs; and (iv) the effective diffusion increases with the increase of a1, namely, the linear term in modified energy conversion model of the ABPs can enhance the diffusion of the ABPs.

Keywords: Correlated noises; Active Brownian motion; Modified energy-depot model; Transport properties (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:505:y:2018:i:c:p:716-728

DOI: 10.1016/j.physa.2018.03.065

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