title: Strings of droplets propelled by coherent waves.
abstract: Bouncing walking droplets possess fascinating properties due to their peculiar wave-particle interaction leading to unexpected quantumlike behaviors. We propose a study consisting in droplets walking along annular cavities. We show that, in this geometry, they spontaneously form a string of synchronized bouncing droplets that share a common coherent wave propelling the group at a speed faster than single walkers. The formation of this coherent wave and the collective droplet behaviors are captured by a model. Those are at the opposite of the ones found in two-dimensional geometries. Our results shed light on walking dynamics.
authors.affiliation: GRASP, Institute of Physics B5a, University of Liège, B4000 Liège, Belgium.
authors.forename: B
authors.initials: B
authors.lastname: Filoux
authors.affiliation: GRASP, Institute of Physics B5a, University of Liège, B4000 Liège, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Hubert
authors.affiliation: GRASP, Institute of Physics B5a, University of Liège, B4000 Liège, Belgium.
authors.forename: N
authors.initials: N
authors.lastname: Vandewalle