'Shut down' of an atom laser

Details 'Shut down' of an atom laser 'Shut down' of an atom laser

2005-01-31

arxiv.org/abs/cond-mat/0501747v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 5 figures

Scientific paper

We present experimental results demonstrating that the flux of a continuous atom laser beam cannot be arbitrarily increased by increasing the strength of output-coupling. We find that a state changing output-coupler for a continuous atom laser switches off as the output-coupling strength, parameterized by the Rabi frequency, is increased above a critical value of four times the radial trapping frequency. In addition, we find that the continuous atom laser has large classical fluctuations when the Rabi frequency is greater than the radial trapping frequency, due to the output-coupling populating all accessible Zeeman states. The numerical solution of a one-dimensional 5-state Gross-Pitaevskii model for the atom laser is in good qualitative agreement with the experiment.

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