Cadoret Malo, de Mirandes Estefania, Cladé Pierre, Guellati-Khélifa Saïda, Schwob Catherine, Nez François, Julien Lucile, Biraben François
Laboratoire Kastler Brossel, Ecole Normale Supérieure, Université Pierre et Marie Curie, CNRS, 4 place Jussieu, 75252 Paris Cedex 05, France.
Phys Rev Lett. 2008 Dec 5;101(23):230801. doi: 10.1103/PhysRevLett.101.230801. Epub 2008 Dec 3.
We report a new experimental scheme which combines atom interferometry with Bloch oscillations to provide a new measurement of the ratio h/mRb. By using Bloch oscillations, we impart to the atoms up to 1600 recoil momenta and thus we improve the accuracy on the recoil velocity measurement. The deduced value of h/mRb leads to a new determination of the fine structure constant alpha(-1) =137.03599945 (62) with a relative uncertainty of 4.6 x 10(-9). The comparison of this result with the value deduced from the measurement of the electron anomaly provides the most stringent test of QED.
我们报告了一种新的实验方案，该方案将原子干涉测量法与布洛赫振荡相结合，以提供对h/mRb比值的新测量。通过使用布洛赫振荡，我们赋予原子高达1600个反冲动量，从而提高了反冲速度测量的精度。推导出的h/mRb值导致对精细结构常数α^(-1)=137.03599945(62)的新测定，相对不确定度为4.6×10^(-9)。将该结果与从电子反常测量中推导出的值进行比较，为量子电动力学提供了最严格的检验。
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