Atom interferometry gravity-gradiometer for the determination of the Newtonian gravitational constant G |
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Authors: | A Bertoldi G Lamporesi L Cacciapuoti M de Angelis M Fattori T Petelski A Peters M Prevedelli J Stuhler G M Tino |
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Institution: | (1) Dipartimento di Fisica and LENS, Università di Firenze, INFN, Sezione di Firenze, Via Sansone 1, 50019 Sesto Fiorentino (Firenze), Italy |
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Abstract: | We developed a gravity-gradiometer based on atom interferometry for the determination of the Newtonian gravitational constant
G.
The apparatus, combining a Rb fountain, Raman interferometry and a juggling scheme for fast launch of two atomic clouds, was
specifically
designed to reduce possible systematic effects. We present instrument performances and preliminary results for the measurement
of G with a relative uncertainty of 1%. A discussion of projected accuracy for G measurement using this new scheme shows
that the results of the experiment will be significant to discriminate between previous inconsistent values. |
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Keywords: | 03 75 Dg Atom and neutron interferometry 04 80 -y Experimental studies of gravity 06 20 Jr Determination of fundamental constants |
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