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Hermann Uys, Michael J. Biercuk, Aaron Vandevender, Christian Ospelkaus, Dominic Meiser, R. Ozeri, John Bollinger
Abstract
We present theoretical and experimental studies of the decoherence of hyperfine ground-state superpositions due to elastic Rayleigh scattering of off-resonant light. We demonstrate that under appropriate conditions, elastic Rayleigh scattering can be the dominant source of decoherence, contrary to previous discussions in the literature. We show that the elastic-scattering decoherence rate of a two-level system is given by the square of the difference between the elastic-scattering \textitamplitudes} for the two levels, and that for certain detunings of the light, the amplitudes can interfere constructively even when the elastic scattering \textitrates} from the two levels are equal. We confirm this prediction through calculations and measurements of the total decoherence rate for a superposition of the valence electron spin levels in the ground state of 9Be+ in a 4.5 T magnetic field.
Uys, H.
, Biercuk, M.
, Vandevender, A.
, Ospelkaus, C.
, Meiser, D.
, Ozeri, R.
and Bollinger, J.
(2010),
Decoherence due to elastic Rayleigh scattering, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906081
(Accessed October 9, 2025)