TY - JOUR
T1 - Atom Interferometer Measurement of the Newtonian Constant of Gravity
JF - Science
JO - Science
SP - 74
LP - 77
DO - 10.1126/science.1135459
VL - 315
IS - 5808
AU - Fixler, J. B.
AU - Foster, G. T.
AU - McGuirk, J. M.
AU - Kasevich, M. A.
Y1 - 2007/01/05
UR - http://science.sciencemag.org/content/315/5808/74.abstract
N2 - 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 × 10–11 cubic meters per kilogram second squared, with a standard error of the mean of ±0.027 × 10–11 and a systematic error of ±0.021 × 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.
ER -