Two-dimensional transport model of coupled Brownian particles driven by biharmonic forces and constant forces

Weixia Wu; Tao Meng

doi:10.1117/12.2270606

23 January 2017 Two-dimensional transport model of coupled Brownian particles driven by biharmonic forces and constant forces

Weixia Wu, Tao Meng

Author Affiliations +

Proceedings Volume 10322, Seventh International Conference on Electronics and Information Engineering; 1032206 (2017) https://doi.org/10.1117/12.2270606
Event: Seventh International Conference on Electronics and Information Engineering, 2016, Nanjing, China

Abstract

A directed transport model of coupled Brownian particles in a two-dimensional potential is established. In this model, the system of Brownian particles is driven by biharmonic forces and constant forces. By numerical simulation, the cooperative transport behaviours of the system are investigated. The results show that the average velocity of the system is significantly independent of the frequencies and intensities of the harmonic forces, the barrier height of the ratchet potential, coupling strength and noise intensity. The average velocity increases monotonically with increasing the intensities of the harmonic forces, and can reach some maximum values when the two frequencies are equal. In addition, the average velocity presents stochastic resonance and generalized resonance for noise intensity, coupling strength and the barrier height of the ratchet potential. Moreover, when a constant force is exerted on the ratchet potential direction, it will promote the directed transport of the system. But, when on the non-ratchet potential direction, the transport will not be affected.

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Weixia Wu and Tao Meng "Two-dimensional transport model of coupled Brownian particles driven by biharmonic forces and constant forces", Proc. SPIE 10322, Seventh International Conference on Electronics and Information Engineering, 1032206 (23 January 2017); https://doi.org/10.1117/12.2270606

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