Sensitivity limits of a Raman atom interferometer as a gravity gradiometer
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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Cite
@article{arxiv.1312.3741,
title = {Sensitivity limits of a Raman atom interferometer as a gravity gradiometer},
author = {F. Sorrentino and Q. Bodart and L. Cacciapuoti and Y. -H. Lien and M. Prevedelli and G. Rosi and L. Salvi and G. M. Tino},
journal= {arXiv preprint arXiv:1312.3741},
year = {2015}
}
Comments
19 pages, 20 figures