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25 February 2020 Decoherence and dynamics in continuous 3D-cooled atom interferometry
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Abstract
We study decoherence in continuously cooled atom interferometers by performing Raman-Ramsey fringe measurements in a continuous beam of 3D-sub-Doppler-cooled rubidium atoms. The atom beam is produced by a two-stage cold atom source that is designed to mitigate the decoherence of atomic interference caused by cooling induced fluorescence. The atom beam source produces a collimated beam of over 109 atoms/s that is cooled by polarization gradient cooling to temperatures as low as 14 µK. We infer the potential performance of this atom beam source in a cold-atom gyroscope and use numerical models of motion in 6 degrees of freedom to study the expected performance on dynamic platforms.
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Adam T. Black, Jonathan M. Kwolek, Charles T. Fancher, and Mark Bashkansky "Decoherence and dynamics in continuous 3D-cooled atom interferometry", Proc. SPIE 11296, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology II, 1129607 (25 February 2020); https://doi.org/10.1117/12.2552540
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