title: Faraday patterns in bose-Einstein condensates.
abstract: Temporal periodic modulation of the interatomic s-wave scattering length in Bose-Einstein condensates is shown to excite subharmonic patterns in the atom density through a parametric resonance. The dominant wavelength of the spatial structures is primarily selected by the excitation frequency but also affected by the depth of the spatial modulation via a nonlinear resonance. These phenomena represent analogues of the Faraday patterns excited in vertically vibrated liquids.
authors.affiliation: Physikalisch Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany.
authors.forename: Kestutis
authors.initials: K
authors.lastname: Staliunas
authors.forename: Stefano
authors.initials: S
authors.lastname: Longhi
authors.forename: Germán J
authors.initials: GJ
authors.lastname: De Valcárcel