We present here the current status of our high-sensitivity gravity-gradiometer based on atom interferometry. In our apparatus, two clouds of laser-cooled rubidium atoms are launched in a fountain configuration and simultaneously interrogated by a Raman-pulse interferometry sequence. The system has recently been upgraded and its stability re-evaluated. We also discuss the recent progress of the experiment towards a precise determination of the Newtonian gravitational constant G. The signal-to-noise ratio and the long-term stability of the gravity gradiometer demonstrated interesting perspectives for pushing the G measurement precision below the 100 ppm level.

Sensitive gravity-gradiometry with atom interferometry: progress towards an improved determination of the gravitational constant / F. Sorrentino; Y-H. Lien; G. Rosi; L. Cacciapuoti; M. Prevedelli; G. M. Tino. - In: NEW JOURNAL OF PHYSICS. - ISSN 1367-2630. - STAMPA. - 12:(2010), pp. 095009-1-095009-17. [10.1088/1367-2630/12/9/095009]

Sensitive gravity-gradiometry with atom interferometry: progress towards an improved determination of the gravitational constant

SORRENTINO, FIODOR;CACCIAPUOTI, LUIGI;PREVEDELLI, MARCO;TINO, GUGLIELMO MARIA
2010

Abstract

We present here the current status of our high-sensitivity gravity-gradiometer based on atom interferometry. In our apparatus, two clouds of laser-cooled rubidium atoms are launched in a fountain configuration and simultaneously interrogated by a Raman-pulse interferometry sequence. The system has recently been upgraded and its stability re-evaluated. We also discuss the recent progress of the experiment towards a precise determination of the Newtonian gravitational constant G. The signal-to-noise ratio and the long-term stability of the gravity gradiometer demonstrated interesting perspectives for pushing the G measurement precision below the 100 ppm level.
12
095009-1
095009-17
F. Sorrentino; Y-H. Lien; G. Rosi; L. Cacciapuoti; M. Prevedelli; G. M. Tino
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2158/393524
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