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arXiv · 1503.00401

Test of Equivalence Principle at $10^{-8}$ Level by a Dual-species Double-diffraction Raman Atom Interferometer

Lin Zhou·Shitong Long·Biao Tang·Xi Chen·Fen Gao·Wencui Peng·Weitao Duan·Jiaqi Zhong·Zongyuan Xiong·Jin Wang·Yuanzhong Zhang·Mingsheng Zhan
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Abstract

We report an improved test of the weak equivalence principle by using a simultaneous $^{85}$Rb-$^{87}$Rb dual-species atom interferometer. We propose and implement a four-wave double-diffraction Raman transition scheme for the interferometer, and demonstrate its ability in suppressing common-mode phase noise of Raman lasers after their frequencies and intensity ratios are optimized. The statistical uncertainty of the experimental data for E\"{o}tv\"{o}s parameter $\eta$ is $0.8\times10^{-8}$ at 3200 s. With various systematic errors corrected the final value is $\eta=(2.8\pm3.0)\times10^{-8}$. The major uncertainty is attributed to the Coriolis effect.

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Lin Zhou, Shitong Long, Biao Tang, Xi Chen, Fen Gao, Wencui Peng, Weitao Duan, Jiaqi Zhong, Zongyuan Xiong, Jin Wang, Yuanzhong Zhang, Mingsheng Zhan. 2015-03-02. Test of Equivalence Principle at $10^{-8}$ Level by a Dual-species Double-diffraction Raman Atom Interferometer. https://doi.org/10.1103/physrevlett.115.013004

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