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American Physical Society, Physical Review A, 1(79)

DOI: 10.1103/physreva.79.011601

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Paired atom laser beams created via four-wave mixing

Journal article published in 2008 by R. G. Dall, L. J. Byron, A. G. Truscott ORCID, G. R. Dennis, M. T. Johnsson, J. J. Hope
This paper is available in a repository.
This paper is available in a repository.

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Abstract

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. ; Comment: 5 pages, 3 figures