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arXiv · 1312.3741

Sensitivity limits of a Raman atom interferometer as a gravity gradiometer

F. Sorrentino·Q. Bodart·L. Cacciapuoti·Y. -H. Lien·M. Prevedelli·G. Rosi·L. Salvi·G. M. Tino
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Abstract

We evaluate the sensitivity of a dual cloud atom interferometer to the measurement of vertical gravity gradient. We study the influence of most relevant experimental parameters on noise and long-term drifts. Results are also applied to the case of doubly differential measurements of the gravitational signal from local source masses. We achieve a short term sensitivity of 3*10^(-9) g/Hz^(-1/2) to differential gravity acceleration, limited by the quantum projection noise of the instrument. Active control of the most critical parameters allows to reach a resolution of 5*10^(-11) g after 8000 s on the measurement of differential gravity acceleration. The long term stability is compatible with a measurement of the gravitational constant G at the level of 10^(-4) after an integration time of about 100 hours.

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F. Sorrentino, Q. Bodart, L. Cacciapuoti, Y. -H. Lien, M. Prevedelli, G. Rosi, L. Salvi, G. M. Tino. 2013-12-13. Sensitivity limits of a Raman atom interferometer as a gravity gradiometer. https://doi.org/10.1103/physreva.89.023607

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