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Atoms 2016, 4(3), 19;

Prospects for Precise Measurements with Echo Atom Interferometry

Department of Physics & Astronomy, York University, 4700 Keele, Toronto ON M3J 1P3, Canada
Institut d’Optique d’Aquitaine, rue François Mitterand, Talence 33400, France
Author to whom correspondence should be addressed.
Academic Editor: James F. Babb
Received: 30 March 2016 / Revised: 20 June 2016 / Accepted: 21 June 2016 / Published: 27 June 2016
(This article belongs to the Special Issue Atom Interferometry)
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Echo atom interferometers have emerged as interesting alternatives to Raman interferometers for the realization of precise measurements of the gravitational acceleration g and the determination of the atomic fine structure through measurements of the atomic recoil frequency ω q . Here we review the development of different configurations of echo interferometers that are best suited to achieve these goals. We describe experiments that utilize near-resonant excitation of laser-cooled rubidium atoms by a sequence of standing wave pulses to measure ω q with a statistical uncertainty of 37 parts per billion (ppb) on a time scale of ∼50 ms and g with a statistical precision of 75 ppb. Related coherent transient techniques that have achieved the most statistically precise measurements of atomic g-factor ratios are also outlined. We discuss the reduction of prominent systematic effects in these experiments using off-resonant excitation by low-cost, high-power lasers. View Full-Text
Keywords: atom interferometry; metrology; laser-cooling and trapping atom interferometry; metrology; laser-cooling and trapping

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Barrett, B.; Carew, A.; Beica, H.C.; Vorozcovs, A.; Pouliot, A.; Kumarakrishnan, A. Prospects for Precise Measurements with Echo Atom Interferometry. Atoms 2016, 4, 19.

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