2008/03/31 by Stephan Middelkamp, S. Middelkamp, Igor Lesanovsky +3
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Mechanical and Optical Resonators #Quantum chaos and dynamical systems #cond-mat.other
paper · pdf · doi:10.1209/0295-5075/84/40011
published as EPL, 84 (2008) 40011 · 5 pages, 4 figures
openalex publication_date 2008/11/01 · arxiv created 2008/11/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We demonstrate that atoms in magnetically insensitive hyperfine states ( m =0) can be trapped efficiently by a Bose-Einstein Condensate of the same atomic species occupying a different hyperfine state. The latter is trapped magnetically. Hyperfine-state–changing collisions, and therefore loss of the trapped ( m =0) atoms, are shown to be strongly inhibited in case of a low density of the confined atomic cloud. We monitor the transition from a "soft" to a "hard" effective potential by studying the backaction of the trapped ( m =0) atoms onto the condensate which provides their confinement. The controlled outcoupling of the trapped atoms by shaping the condensate wave function is explored. We observe a pulsed emission of atoms from the trapping region reminiscent of an atom laser.