title: Emergent Hyperuniformity in Periodically Driven Emulsions.
abstract: We report the self-organization of microfluidic emulsions into anomalously homogeneous structures. Upon periodic driving confined emulsions undergo a first-order transition from a reversible to an irreversible dynamics. We evidence that this dynamical transition is accompanied by structural changes at all scales yielding macroscopic yet finite hyperuniform structures. Numerical simulations are performed to single out the very ingredients responsible for the suppression of density fluctuations. We show that, as opposed to equilibrium systems, the long-range nature of the hydrodynamic interactions are not required for the formation of hyperuniform patterns, thereby suggesting a robust relation between reversibility and hyperuniformity which should hold in a broad class of periodically driven materials.
authors.affiliation: Laboratoire de Physique de l'École Normale Supérieure de Lyon, Université de Lyon, 46, allée d'Italie, 69007 Lyon, France.
authors.forename: Joost H
authors.initials: JH
authors.lastname: Weijs
authors.affiliation: Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
authors.forename: Raphaël
authors.initials: R
authors.lastname: Jeanneret
authors.affiliation: Complex Assemblies of Soft Matter, CNRS-Solvay-UPenn UMI 3254, Bristol, Pennsylvania 19007-3624, USA.
authors.forename: Rémi
authors.initials: R
authors.lastname: Dreyfus
authors.affiliation: Laboratoire de Physique de l'École Normale Supérieure de Lyon, Université de Lyon, 46, allée d'Italie, 69007 Lyon, France.
authors.forename: Denis
authors.initials: D
authors.lastname: Bartolo