Sensitivity limits of a Raman atom interferometer as a gravity gradiometer

被引：185

作者：

Sorrentino, F. ^{[1
,2
]}

Bodart, Q. ^{[1
,2
]}

Cacciapuoti, L. ^{[3
]}

Lien, Y. -H. ^{[1
,2
]}

Prevedelli, M. ^{[4
]}

Rosi, G. ^{[1
,2
]}

Salvi, L. ^{[1
,2
]}

Tino, G. M. ^{[1
,2
]}

机构：

[1] Univ Florence, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, FI, Italy

[2] Univ Florence, LENS, Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, FI, Italy

[3] European Space Agcy, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands

[4] Univ Bologna, Dipartimento Fis & Astron, I-40127 Bologna, Italy

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 02期

关键词：

GRAVITATIONAL ACCELERATION; FUNDAMENTAL PHYSICS; CONSTANT; WAVES;

D O I：

10.1103/PhysRevA.89.023607

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 x 10(-9) g/root Hz to differential gravity acceleration, limited by the quantum projection noise of the instrument. Active control of the most critical parameters allows us to reach a resolution of 5 x 10(-1)1 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 h.

引用

页数：14

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