Effect of gravity gradient in weak equivalence principle test

doi:10.1088/1674-1056/26/8/080401

Abstract

A high accuracy test of the weak equivalence principle (WEP) is of great scientific significance no matter whether its result is positive. We analyze the gravity gradient effect which is a main systematic error source in the test of WEP. The result shows that the uncompensated gravity gradient effect from the coupling term of the dominated gravity gradient multipole moment component q₂₁ and the relative multipole field component Q₂₁ contributes to an uncertainty of 1×10^-11 on the Eötvös parameter. We make a Q₂₁ compensation to reduce the effect by about 20 times, and the limit of the test precision due to this coupling is improved to a level of a part in 10¹³.

Keywords: weak equivalence principle test gravity gradient effect test precision gravity gradient compensation

Received: 02 March 2017
Revised: 20 April 2017
Accepted manuscript online:

PACS:

04.80.Cc

(Experimental tests of gravitational theories)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11575160 and 11605065).

Corresponding Authors: Jie Luo, Qi Liu
E-mail: luojiethanks@126.com;louis_liuqi@hust.edu.com

About author: 0.1088/1674-1056/26/8/

Cite this article:

Jia-Hao Xu(徐家豪), Cheng-Gang Shao(邵成刚), Jie Luo(罗杰), Qi Liu(刘祺), Lin Zhu(邾琳), Hui-Hui Zhao(赵慧慧) Effect of gravity gradient in weak equivalence principle test 2017 Chin. Phys. B 26 080401

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