Prospects for Precise Measurements with Echo Atom Interferometry

Brynle Barrett; Adam Carew; Hermina C. Beica; Andrejs Vorozcovs; Alexander Pouliot; A. Kumarakrishnan

doi:10.3390/atoms4030019

paper

Prospects for Precise Measurements with Echo Atom Interferometry

arXiv:1606.06831 · doi:10.3390/atoms4030019

Abstract

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 $\sim 50$ 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.

34 pages + references, 17 figures

Prospects for Precise Measurements with Echo Atom Interferometry

Abstract

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