Document Type

Article

Publication Date

11-2-1999

Publication Title

Journal of Physics B: Atomic, Molecular and Optical Physics

DOI

10.1088/0953-4075/33/1/305

ISSN

1361-6455

Abstract

We study the coherence properties of an atom laser, which operates by extracting atoms from a gaseous Bose-Einstein condensate via a two-photon Raman process, by analysing a recent experiment (Hagley et al1999 Phys. Rev. Lett.833112). We obtain good agreement with the experimental data by solving the time-dependent Gross-Pitaevskii equation in three dimensions both numerically and with a Thomas-Fermi model. The coherence is strongly affected by the space-dependent phase developed by the condensate when the trapping potential is turned off.

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