Canceling the Gravity Gradient Phase Shift in Atom Interferometry

Physical Review Letters
G D'AmicoG M Tino

Abstract

Gravity gradients represent a major obstacle in high-precision measurements by atom interferometry. Controlling their effects to the required stability and accuracy imposes very stringent requirements on the relative positioning of freely falling atomic clouds, as in the case of precise tests of Einstein's equivalence principle. We demonstrate a new method to exactly compensate the effects introduced by gravity gradients in a Raman-pulse atom interferometer. By shifting the frequency of the Raman lasers during the central π pulse, it is possible to cancel the initial position- and velocity-dependent phase shift produced by gravity gradients. We apply this technique to simultaneous interferometers positioned along the vertical direction and demonstrate a new method for measuring local gravity gradients that does not require precise knowledge of the relative position between the atomic clouds. Based on this method, we also propose an improved scheme to determine the Newtonian gravitational constant G towards the 10 ppm relative uncertainty.

References

Aug 16, 2006·Physical Review Letters·B CanuelP Bouyer
May 16, 2007·Physical Review Letters·Savas DimopoulosMark A Kasevich
Aug 4, 2007·The Review of Scientific Instruments·G LamporesiG M Tino
Feb 1, 2008·Physical Review Letters·Holger MüllerKeng-Yeow Chung
Mar 21, 2008·Physical Review Letters·G LamporesiG M Tino
Apr 3, 2012·Physical Review Letters·Shau-Yu LanHolger Müller
Sep 10, 2014·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·M PrevedelliG M Tino
Jan 24, 2015·Physical Review Letters·G RosiG M Tino
Aug 22, 2015·Science·P HamiltonJ Khoury
Dec 25, 2015·Nature·T KovachyM A Kasevich
May 20, 2017·Physical Review Letters·Peter AsenbaumMark A Kasevich

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Citations

Oct 9, 2018·Physical Review Letters·Albert Roura
May 19, 2018·Physical Review Letters·Chris OverstreetMark A Kasevich
Dec 5, 2020·Physical Review Letters·L A SidorenkovA Landragin
Dec 19, 2020·Scientific Reports·Florian FitzekNaceur Gaaloul
Jul 11, 2021·The Review of Scientific Instruments·De-Kai MaoZhong-Kun Hu
Jul 11, 2021·The Review of Scientific Instruments·Yao-Yao XuZhong-Kun Hu

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