Systematic error suppression scheme of the weak equivalence principle test by dual atom interferometers in space based on spectral correlation

doi:10.1088/1674-1056/aba609

中国物理B ›› 2020, Vol. 29 ›› Issue (11): 110305-.doi: 10.1088/1674-1056/aba609

Jian-Gong Hu(胡建功)¹^,†(), Xi Chen(陈曦)²^,³, Li-Yong Wang(王立勇)⁴^,⁵, Qing-Hong Liao(廖庆洪)¹, Qing-Nian Wang(汪庆年)¹

收稿日期:2020-05-14 修回日期:2020-06-29 接受日期:2020-07-15 出版日期:2020-11-05 发布日期:2020-11-03

Systematic error suppression scheme of the weak equivalence principle test by dual atom interferometers in space based on spectral correlation

Jian-Gong Hu(胡建功)^{1, †}, Xi Chen(陈曦)^2,3, Li-Yong Wang(王立勇)^4,5, Qing-Hong Liao(廖庆洪)¹, and Qing-Nian Wang(汪庆年)¹$

1 School of Information Engineering, Nanchang University, Nanchang 330031, China
2 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Wuhan 430071, China
3 Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China
4 Center for Optics Research and Engineering, Shandong University, Qingdao 266237, China
5 School of Information Science and Engineering, Shandong University, Qingdao 266237, China

Received:2020-05-14 Revised:2020-06-29 Accepted:2020-07-15 Online:2020-11-05 Published:2020-11-03
Contact: ^†Corresponding author. E-mail: jghu@ncu.edu.cn
Supported by:
the National Natural Science Foundation of China (Grants No. 11947057), the Foundation for Distinguished Young Scientist of Jiangxi Province, China (Grant No. 2016BCB23009), and the Postdoctoral Applied Research Program of Qingdao City, Shandong Province, China (Grant No. 62350079311135).

摘要/Abstract

Abstract:

Systematic error suppression and test data processing are very important in improving the accuracy and sensitivity of the atom interferometer (AI)-based weak-equivalence-principle (WEP) test in space. Here we present a spectrum correlation method to investigate the test data of the AI-based WEP test in space by analyzing the characteristics of systematic errors and noises. The power spectrum of the Eötvös coefficient η, systematic errors, and noises in AI-based WEP test in space are analyzed and calculated in detail. By using the method, the WEP violation signal is modulated from direct current (DC) frequency band to alternating current (AC) frequency band. We find that the signal can be effectively extracted and the influence of systematic errors can be greatly suppressed by analyzing the power spectrum of the test data when the spacecraft is in an inertial pointing mode. Furthermore, the relation between the Eötvös coefficient η and the number of measurements is obtained under certain simulated parameters. This method will be useful for both isotopic and nonisotopic AI-based WEP tests in space.

Key words: atom interferometer, weak equivalence principle, spectral correlation, systematic error

Jian-Gong Hu(胡建功), Xi Chen(陈曦), Li-Yong Wang(王立勇), Qing-Hong Liao(廖庆洪), Qing-Nian Wang(汪庆年). [J]. 中国物理B, 2020, 29(11): 110305-.

Jian-Gong Hu(胡建功), Xi Chen(陈曦), Li-Yong Wang(王立勇), Qing-Hong Liao(廖庆洪), and Qing-Nian Wang(汪庆年)$. Systematic error suppression scheme of the weak equivalence principle test by dual atom interferometers in space based on spectral correlation[J]. Chin. Phys. B, 2020, 29(11): 110305-.

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Systematic error suppression scheme of the weak equivalence principle test by dual atom interferometers in space based on spectral correlation

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