title: Andreev reflection in bosonic condensates.
abstract: We study the bosonic analog of Andreev reflection at a normal-superfluid interface where the superfluid is a boson condensate. We model the normal region as a zone where nonlinear effects can be neglected. Against the background of a decaying condensate, we identify a novel contribution to the current of reflected atoms. The group velocity of this Andreev reflected component differs from that of the normally reflected one. For a three-dimensional planar or two-dimensional linear interface Andreev reflection is neither specular nor conjugate.
authors.affiliation: Departamento de Física de Materiales, Universidad Complutense de Madrid, E-28040 Madrid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Zapata
authors.forename: F
authors.initials: F
authors.lastname: Sols