title: Cavity-controlled collective scattering at the recoil limit.
abstract: We study collective scattering with Bose-Einstein condensates interacting with a high-finesse ring cavity. The condensate scatters the light of a transverse pump beam superradiantly into modes which, in contrast to previous experiments, are not determined by the geometrical shape of the condensate, but specified by a resonant cavity mode. Moreover, since the recoil-shifted frequency of the scattered light depends on the initial momentum of the scattered fraction of the condensate, we show that it is possible to employ the good resolution of the cavity as a filter selecting particular quantized momentum states.
authors.affiliation: Physikalisches Institut, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany.
authors.forename: Simone
authors.initials: S
authors.lastname: Bux
authors.forename: Christine
authors.initials: C
authors.lastname: Gnahm
authors.forename: Reinhardt A W
authors.initials: RA
authors.lastname: Maier
authors.forename: Claus
authors.initials: C
authors.lastname: Zimmermann
authors.forename: Philippe W
authors.initials: PW
authors.lastname: Courteille