Correlation method estimation of the modulation signal in the weak equivalence principle test

doi:10.1088/1674-1056/27/8/080402

中国物理B ›› 2018, Vol. 27 ›› Issue (8): 80402-080402.doi: 10.1088/1674-1056/27/8/080402

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Correlation method estimation of the modulation signal in the weak equivalence principle test

Jie Luo(罗杰), Liang-Cheng Shen(沈良程), Cheng-Gang Shao(邵成刚), Qi Liu(刘祺), Hui-Jie Zhang(张惠捷)

1 School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China;
2 MOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
3 TIANQIN Research Center for Gravitational Physics, School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, China

收稿日期:2018-04-04 修回日期:2018-05-18 出版日期:2018-08-05 发布日期:2018-08-05
通讯作者: Cheng-Gang Shao, Qi Liu E-mail:cgshao@hust.edu.cn;louis_liuqi@hust.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11575160, 91636221, and 11605065).

Correlation method estimation of the modulation signal in the weak equivalence principle test

Jie Luo(罗杰)¹, Liang-Cheng Shen(沈良程)¹, Cheng-Gang Shao(邵成刚)², Qi Liu(刘祺)³, Hui-Jie Zhang(张惠捷)¹

1 School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan 430074, China;
2 MOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
3 TIANQIN Research Center for Gravitational Physics, School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082, China

Received:2018-04-04 Revised:2018-05-18 Online:2018-08-05 Published:2018-08-05
Contact: Cheng-Gang Shao, Qi Liu E-mail:cgshao@hust.edu.cn;louis_liuqi@hust.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11575160, 91636221, and 11605065).

摘要/Abstract

摘要：

In a test of the weak equivalence principle (WEP) with a rotating torsion pendulum, it is important to estimate the amplitude of the modulation signal with high precision. We use a torsional filter to remove the free oscillation signal and employ the correlation method to estimate the amplitude of the modulation signal. The data analysis of an experiment shows that the uncertainties of amplitude components of the modulation signal obtained by the correlation method are in agreement with those due to white noise. The power spectral density of the modulation signal obtained by the correlation method is about one order higher than the thermal noise limit. It indicates that the correlation method is an effective way to estimate the amplitude of the modulation signal and it is instructive to conduct a high-accuracy WEP test.

关键词: weak equivalence principle test, correlation method, amplitude estimation, thermal noise limit

Abstract:

Key words: weak equivalence principle test, correlation method, amplitude estimation, thermal noise limit

中图分类号: (Experimental tests of gravitational theories)

04.80.Cc

罗杰, 沈良程, 邵成刚, 刘祺, 张惠捷. Correlation method estimation of the modulation signal in the weak equivalence principle test[J]. 中国物理B, 2018, 27(8): 80402-080402.

Jie Luo(罗杰), Liang-Cheng Shen(沈良程), Cheng-Gang Shao(邵成刚), Qi Liu(刘祺), Hui-Jie Zhang(张惠捷). Correlation method estimation of the modulation signal in the weak equivalence principle test[J]. Chin. Phys. B, 2018, 27(8): 80402-080402.

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Correlation method estimation of the modulation signal in the weak equivalence principle test

Correlation method estimation of the modulation signal in the weak equivalence principle test

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