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Title: State detection using coherent Raman repumping and two-color Raman transfers
Authors: Chuah, B.L.
Lewty, N.C.
Barrett, M.D. 
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.
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
ISSN: 10502947
DOI: 10.1103/PhysRevA.84.013411
Appears in Collections:Staff Publications

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