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學術成果

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Testing the Universality of Free Fall by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction

作者: 來源: 發布時間:2020年04月02日 20:39 點擊次數:[]

Testing the Universality of Free Fall by Comparing the Atoms in Different 

Hyperfine States with Bragg Diffraction

Ke Zhang, Min-Kang Zhou, Yuan Cheng, Le-Le Chen, Qin Luo, Wen-Jie Xu, Lu-Shuai Cao, Xiao-Chun Duan, Zhong-Kun Hu

We perform a precision atom interferometry experiment to test the universality of free fall. Our experiment employs the Bragg atom interferometer with 87Rb atoms either in hyperfine state |F = 1, mF = 0> or |F = 2, mF = 0>, and the wave packets in these two states are diffracted by one pair of Bragg beams alternatively, which is helpful for suppressing common-mode systematic errors. We obtain an E?tv?s ratio η1?2 = (0.9 ± 2.7) ×10?10, and set a new record on the precision with improvement of nearly 5 times. This measurement also provides constraint on the difference of the diagonal terms of the mass-energy operator.

期刊名:Chinese Physics Letters

期/卷:Volume 37

頁碼:043701

發表時間:2020.03.24

DOI: 10.1088/0256-307X/37/4/043701


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