Structural correlations in diffusiophoretic colloidal mixtures with nonreciprocal interactions
Abstract
Nonreciprocal effective interaction forces can occur between mesoscopic particles in colloidal suspensions that are driven out of equilibrium. These forces violate Newton's third law actio=reactio on coarse-grained length and time scales. Here we explore the statistical mechanics of Brownian particles with nonreciprocal effective interactions. Our model system is a binary fluid mixture of spherically symmetric, diffusiophoretic mesoscopic particles, and we focus on the time-averaged particle pair- and triplet-correlation functions. Based on the many-body Smoluchowski equation we develop a microscopic statistical theory for the particle correlations and test it by computer simulations. For model systems in two and three spatial dimensions, we show that nonreciprocity induces distinct nonequilibrium pair correlations. Our predictions can be tested in experiments with chemotactic colloidal suspensions.
Cite
@article{arxiv.1510.01870,
title = {Structural correlations in diffusiophoretic colloidal mixtures with nonreciprocal interactions},
author = {Jörg Bartnick and Marco Heinen and Alexei V Ivlev and Hartmut Löwen},
journal= {arXiv preprint arXiv:1510.01870},
year = {2016}
}