Atom interferometer measurement of the newtonian constant of gravity

被引：427

作者：

Fixler, J. B.

Foster, G. T.

McGuirk, J. M.

Kasevich, M. A. ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[2] CUNY Hunter Coll, Dept Phys & Astron, New York, NY 10021 USA

[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

来源：

SCIENCE | 2007年 / 315卷 / 5808期

关键词：

D O I：

10.1126/science.1135459

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We measured the Newtonian constant of gravity, G, using a gravity gradiometer based on atom interferometry. The gradiometer measures the differential acceleration of two samples of laser-cooled Cs atoms. The change in gravitational field along one dimension is measured when a well-characterized Pb mass is displaced. Here, we report a value of G = 6.693 x 10-(11) cubic meters per kilogram second squared, with a standard error of the mean of +/- 0.027 x 10(-11) and a systematic error of +/- 0.021 x 10(-11) cubic meters per kilogram second squared. The possibility that unknown systematic errors still exist in traditional measurements makes it important to measure G with independent methods.

引用

页码：74 / 77

页数：4

共 24 条

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Berman PR., 1996, Atom Interferometry, V1

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