title: Casimir-like force arising from quantum fluctuations in a slowly moving dilute Bose-Einstein condensate.
abstract: We calculate a force due to zero-temperature quantum fluctuations on a stationary object in a moving superfluid flow. We model the object by a localized potential varying only in the flow direction and model the flow by a three-dimensional weakly interacting Bose-Einstein condensate at zero temperature. We show that this force exists for any arbitrarily small flow velocity and discuss the implications for the stability of superfluid flow.
authors.affiliation: Laboratoire de Physique Statistique de l'Ecole normale supérieure, Paris, France.
authors.forename: D C
authors.initials: DC
authors.lastname: Roberts
authors.forename: Y
authors.initials: Y
authors.lastname: Pomeau