title: Interferences in the density of two Bose-Einstein condensates consisting of identical or different atoms.
abstract: The density of two initially independent condensates which are allowed to expand and overlap can show interferences as a function of time due to interparticle interaction. Two situations are separately discussed and compared: (1) all atoms are identical and (2) each condensate consists of a different kind of atoms. Illustrative examples are presented.
authors.affiliation: Theoretical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany.
authors.forename: Lorenz S
authors.initials: LS
authors.lastname: Cederbaum
authors.forename: Alexej I
authors.initials: AI
authors.lastname: Streltsov
authors.forename: Yehuda B
authors.initials: YB
authors.lastname: Band
authors.forename: Ofir E
authors.initials: OE
authors.lastname: Alon