Prevedelli M, Cacciapuoti L, Rosi G, Sorrentino F, Tino G M
Dipartimento di Fisica e Astronomia, Università di Bologna - INFN Sezione di Bologna, Viale Berti-Pichat 6/2, 40127 Bologna, Italy.
European Space Agency, Keplerlaan 1, PO Box 299, 2200 AG Noordwijk ZH, The Netherlands.
Philos Trans A Math Phys Eng Sci. 2014 Oct 13;372(2026). doi: 10.1098/rsta.2014.0030. Epub 2014 Sep 8.
We have recently completed a measurement of the Newtonian constant of gravitation G using atomic interferometry. Our result is G=6.67191(77)(62)×10(-11) m(3) kg(-1) s(-2) where the numbers in parenthesis are the type A and type B standard uncertainties, respectively. An evaluation of the measurement uncertainty is presented and the perspectives for improvement are discussed. Our result is approaching the precision of experiments based on macroscopic sensing masses showing that the next generation of atomic gradiometers could reach a total relative uncertainty in the 10 parts per million range.
我们最近利用原子干涉测量法完成了牛顿引力常数G的测量。我们的测量结果是G = 6.67191(77)(62)×10⁻¹¹ m³ kg⁻¹ s⁻²，其中括号内的数字分别为A类和B类标准不确定度。本文给出了测量不确定度的评估，并讨论了改进的前景。我们的结果正在接近基于宏观传感质量的实验精度，这表明下一代原子梯度仪的总相对不确定度有望达到百万分之十的范围。
