Discovery of propagating trains of oscillons over Faraday waves in a 1D experiment

Abstract

We report the discovery of highly localized structures traveling over a one-dimensionalpattern of Faraday waves in a vertically vibrated fluid layer confined in a thin annular cell. Thesepropagating structures emerge spontaneously beyond a threshold and coexist with the underlyingpattern. They move at constant speed, in trains of sharp peaks that co- and counter-propagatealong the cell, with velocities largely exceeding the Faraday waves drift. Our results raise thequestion whether propagating localized structures are also observable in other parametricallydriven systems in physics.