Phys Rev E Stat Nonlin Soft Matter Phys. 2011 May;83(5):051117. doi: 10.1103/PhysRevE.83.051117. Epub 2011 May 16.

Indirect control of transport and interaction-induced negative mobility in an overdamped system of two coupled particles.

Physical review. E, Statistical, nonlinear, and soft matter physics

M Januszewski, J Łuczka

PMID: 21728500 DOI: 10.1103/PhysRevE.83.051117

Abstract

One-dimensional transport of an overdamped Brownian particle biased by an external constant force does not exhibit negative mobility. However, when the particle is coupled to another particle, negative mobility can arise. We present a minimal model and propose a scenario in which only one (say, the first) particle is dc biased by a constant force and ac driven by an unbiased harmonic signal. In this way we intend to achieve two aims at once: (i) negative mobility of the first particle, which is exclusively induced by coupling to the second particle and (ii) indirect control of the transport properties of the second particle by manipulating the first particle only. For instance, the sign and amplitude of the averaged stationary velocity of the second particle can be steered by the driving applied to the first particle. As an experimentally realizable system, we propose two coupled resistively shunted Josephson junctions.

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't