title: Quasipure Bose-Einstein condensate immersed in a Fermi sea.
abstract: We report the observation of coexisting Bose-Einstein condensate (BEC) and Fermi gas in a magnetic trap. With a very small fraction of thermal atoms, the 7Li condensate is quasipure and in thermal contact with a 6Li Fermi gas. The lowest common temperature is 0.28 microK approximately 0.2(1)T(C) = 0.2(1)T(F) where T(C) is the BEC critical temperature and T(F) the Fermi temperature. The 7Li condensate has a one-dimensional character.
authors.affiliation: Laboratoire Kastler Brossel, Ecole Normale Supérieure, 24 rue Lhomond, 75231 Paris CEDEX 05, France.
authors.forename: F
authors.initials: F
authors.lastname: Schreck
authors.forename: L
authors.initials: L
authors.lastname: Khaykovich
authors.forename: K L
authors.initials: KL
authors.lastname: Corwin
authors.forename: G
authors.initials: G
authors.lastname: Ferrari
authors.forename: T
authors.initials: T
authors.lastname: Bourdel
authors.forename: J
authors.initials: J
authors.lastname: Cubizolles
authors.forename: C
authors.initials: C
authors.lastname: Salomon