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|Title:||State detection using coherent Raman repumping and two-color Raman transfers||Authors:||Chuah, B.L.
|Issue Date:||13-Jul-2011||Citation:||Chuah, B.L., Lewty, N.C., Barrett, M.D. (2011-07-13). State detection using coherent Raman repumping and two-color Raman transfers. Physical Review A - Atomic, Molecular, and Optical Physics 84 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.84.013411||Abstract:||We demonstrate state detection based on coherent Raman repumping and a two-color Raman state transfer. The Raman coupling during detection selectively eliminates unwanted dark states in the fluorescence cycle without compromising the immunity of the desired dark state to off-resonant scattering. We demonstrate this technique using 137Ba+ where a combination of Raman coupling and optical pumping leaves the metastable state, D3/2 |F′′=3,mF′′=3, optically dark and immune to off-resonant scattering. All other states are strongly coupled to the upper P1/2 levels. We achieve a single-shot state-detection efficiency of 89.6(3)% in a 1-ms integration time, limited almost entirely by technical imperfections. Shelving to |F′′=3, mF′′=3 before detection is performed via a two-color Raman transfer with a fidelity of 1.00(3). © 2011 American Physical Society.||Source Title:||Physical Review A - Atomic, Molecular, and Optical Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/98016||ISSN:||10502947||DOI:||10.1103/PhysRevA.84.013411|
|Appears in Collections:||Staff Publications|
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