title: Impact of hydrodynamics on effective interactions in suspensions of active and passive matter.
abstract: Passive particles exhibit unique properties when immersed in an active bath of self-propelling entities. In particular, an effective attraction can appear between particles that repel each other when in a passive solution. Here we numerically study the effect of hydrodynamics on an active-passive hybrid system, where we observe qualitative differences as compared to simulations with excluded volume effects alone. The results shed light on an existing discrepancy in pair lifetimes between simulation and experiment, due to the hydrodynamically enhanced stability of coupled passive particles.
authors.affiliation: Department of Physics, Applied Physics, and Astronomy and The Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
authors.forename: Ryan C
authors.initials: RC
authors.lastname: Krafnick
authors.affiliation: Department of Physics, Applied Physics, and Astronomy and The Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
authors.forename: Angel E
authors.initials: AE
authors.lastname: García
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D004926:Escherichia coli; D057446:Hydrodynamics; D007840:Latex; D008954:Models, Biological; D013535:Suspensions; D013550:Swimming
chemical_list: D007840:Latex; D013535:Suspensions