Physics – Quantum Physics
Scientific paper
2008-06-02
Physics
Quantum Physics
5 pages, 3 figures
Scientific paper
10.1103/PhysRevA.79.011601
A method to create paired atom laser beams from a metastable helium atom laser via four-wave mixing is demonstrated. Radio frequency outcoupling is used to extract atoms from a Bose Einstein condensate near the center of the condensate and initiate scattering between trapped and untrapped atoms. The unequal strengths of the interactions for different internal states allows an energy-momentum resonance which leads to the creation of pairs of atoms scattered from the zero-velocity condensate. The resulting scattered beams are well separated from the main atom laser in the 2-dimensional transverse atom laser profile. Numerical simulations of the system are in good agreement with the observed atom laser spatial profiles, and indicate that the scattered beams are generated by a four-wave mixing process, suggesting that the beams are correlated.
Byron L. J.
Dall R. G.
Dennis Graham R.
Hope Joseph J.
Johnsson Mattias T.
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