Approaching the Heisenberg limit in an atom laser

Details Approaching the Heisenberg limit in an atom laser Approaching the Heisenberg limit in an atom laser

2007-04-03

arxiv.org/abs/0704.0291v2

Physics

Atomic Physics

Corrected analysis, added figure

Scientific paper

10.1103/PhysRevA.77.063618

We present experimental and theoretical results showing the improved beam quality and reduced divergence of an atom laser produced by an optical Raman transition, compared to one produced by an RF transition. We show that Raman outcoupling can eliminate the diverging lens effect that the condensate has on the outcoupled atoms. This substantially improves the beam quality of the atom laser, and the improvement may be greater than a factor of ten for experiments with tight trapping potentials. We show that Raman outcoupling can produce atom lasers whose quality is only limited by the wavefunction shape of the condensate that produces them, typically a factor of 1.3 above the Heisenberg limit.

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