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AC stark shifts of dark resonances probed with Ramsey spectroscopy



James Wesley Y. Pollock, V. I. Yudin, Moshe Shuker, M. Y. Basalaev, A. V. Taichenachev, Xiaochi Liu, John E. Kitching, Elizabeth A. Donley


The off-resonant AC Stark shift for coherent population trapping (CPT) resonances probed with Ramsey spectroscopy is investigated experimentally and theoretically. Measurements with laser- cooled 87Rb atoms show excellent quantitative agreement with a simple theory. The shift depends on the relative intensity of the two CPT light fields, but depends only weakly on the total intensity. Since the origin of the shift is through couplings of the interrogation light to off-resonant excited state hyperfine levels, the size and sign of the shift depend on the specific interrogation scheme. However, the simple theory shows that for several popular interrogation schemes the off-resonant shift goes to zero at specific values of this relative intensity.
Physical Review Letters


coherent population trapping, light shifts, laser cooling, Ramsey spectroscopy


Y., J. , Yudin, V. , Shuker, M. , Basalaev, M. , Taichenachev, A. , Liu, X. , Kitching, J. and Donley, E. (2018), AC stark shifts of dark resonances probed with Ramsey spectroscopy, Physical Review Letters, [online], (Accessed June 20, 2024)


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Created November 16, 2018, Updated February 1, 2019