Dissipative dynamics of an open Bose Einstein condensate
Anno: 2000
Autori: Arecchi F.T., Bragard J., Castellano L.M.
Affiliazione autori: Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;
Department of Physics, University of Firenze, 50125 Firenze, Italy;
Department of Physics, University of Liege, Belgium
Abstract: As an atomic Bose Einstein condensate (BEC) is coupled to a source of uncondensed atoms at the same temperature and to a sink (extraction towards an atom laser) the idealized description in terms of a Gross-Pitaevsky equation (GP) no longer holds. Under suitable physical assumptions we show that the dissipative BEC obeys a Complex Ginzburg Landau equation (CGL) and for some parameter range it undergoes a space time patterning. As a consequence, the density of BEC atoms within the trap displays non trivial space time correlations, which can be detected by monitoring the density profile of the outgoing atom laser. The patterning condition requires a negative scattering length, as e.g. in Li-7. In such a case we expect a many domain collapsed regime, rather than a single one as reported for a closed BEG. (C) 2000 Elsevier Science B.V. All rights reserved.
Giornale/Rivista: OPTICS COMMUNICATIONS (PRINT)
Volume: 179 (1-6) Da Pagina: 149 A: 156
Parole chiavi: GINZBURG-LANDAU EQUATION; LASER; WAVES; GAS; DOI: 10.1016/S0030-4018(99)00670-7Citazioni: 16dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui