Observing the Profile of an Atom Laser Beam
M. Köhl, Th. Busch, K. Molmer, T. W. Hänsch, T. Esslinger
Abstract
We report on an investigation of the beam profile of an atom laser extracted from a magnetically trapped 87Rb Bose-Einstein condensate. The transverse momentum distribution is magnified by a curved mirror for matter waves and a momentum resolution of 1/60 of a photon recoil is obtained. We find the transverse momentum distribution to be determined by the mean-field potential of the residing condensate, which leads to a non-smooth transverse density distribution. Our experimental data are compared with a full 3D simulation of the output coupling process and we find good agreement.
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