Conclusions
An atom laser based on RF-outcoupling can be operated in a coherently pulsed way by using two radio frequencies. Such a two-mode atom laser can be described by coupled Gross-Pitaevskii equations which are valid for very low temperatures (T≈0). We have derived analytic expressions for the output rate and the visibility of the pulsed atomic beam in the weak coupling regime. A comparison between the analytical and numerical results shows a good agreement. This proves our assumption that the outcoupling process may be seen as the coherent outcoupling of two independent atomic beams.
Though our model is only one-dimensional, we expect also a good agreement with the full 3D situation of experiment; the estimate for the value of the output rate might be only in the right order of magnitude16.
Summarizing, the manipulation of trapped Bose condensates with electromagnetic waves opens a wide new area for the field of coherent atom optics.
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Schneider, J., Schenzle, A. (2002). Theory Of A Pulsed RF Atom Laser. In: Martellucci, S., Chester, A.N., Aspect, A., Inguscio, M. (eds) Bose-Einstein Condensates and Atom Lasers. Springer, Boston, MA. https://doi.org/10.1007/0-306-47103-5_10
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