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Chin. Phys. B, 2020, Vol. 29(7): 070305    DOI: 10.1088/1674-1056/ab969a
Special Issue: SPECIAL TOPIC — Ultracold atom and its application in precision measurement
SPECIAL TOPIC—Ultracold atom and its application in precision measurement Prev   Next  

Suppression of Coriolis error in weak equivalence principle test using 85Rb-87Rb dual-species atom interferometer

Wei-Tao Duan(段维涛)1,2, Chuan He(何川)1,2, Si-Tong Yan(闫思彤)1,3, Yu-Hang Ji(冀宇航)1, Lin Zhou(周林)1,2,3, Xi Chen(陈曦)1,2,3, Jin Wang(王谨)1,2,3, Ming-Sheng Zhan(詹明生)1,2,3
1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China;
2 School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Center for Cold Atoms Physics, Chinese Academy of Sciences, Wuhan 430071, China
Abstract  Coriolis effect is an important error source in the weak equivalence principle (WEP) test using atom interferometer. In this paper, the problem of Coriolis error in WEP test is studied theoretically and experimentally. In theoretical simulation, the Coriolis effect is analyzed by establishing an error model. The measurement errors of Eötvös coefficient (η) in WEP test related to experimental parameters, such as horizontal-velocity difference and horizontal-position difference of atomic clouds, horizontal-position difference of detectors, and rotation compensation of Raman laser's mirror are calculated. In experimental investigation, the position difference between 85Rb and 87Rb atomic clouds is reduced to 0.1 mm by optimizing the experimental parameters, an alternating detection method is used to suppress the error caused by detection position difference, thus the Coriolis error related to the atomic clouds and detectors is reduced to 1.1×10-9. This Coriolis error is further corrected by compensating the rotation of Raman laser's mirror, and the total uncertainty of η measurement related to the Coriolis effect is reduced as δη=4.4×10 -11.
Keywords:  atom interferometer      weak equivalence principle test      Coriolis effect  
Received:  31 March 2020      Revised:  04 May 2020      Accepted manuscript online: 
PACS:  03.75.Dg (Atom and neutron interferometry)  
  06.30.Gv (Velocity, acceleration, and rotation)  
  37.25.+k (Atom interferometry techniques)  
  32.80.Qk (Coherent control of atomic interactions with photons)  
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302002), the National Natural Science Foundation of China (Grant Nos. 91736311 and 11574354), Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB21010100), and the Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2016300).
Corresponding Authors:  Lin Zhou, Jin Wang     E-mail:  lzhou@wipm.ac.cn;wangjin@wipm.ac.cn

Cite this article: 

Wei-Tao Duan(段维涛), Chuan He(何川), Si-Tong Yan(闫思彤), Yu-Hang Ji(冀宇航), Lin Zhou(周林), Xi Chen(陈曦), Jin Wang(王谨), Ming-Sheng Zhan(詹明生) Suppression of Coriolis error in weak equivalence principle test using 85Rb-87Rb dual-species atom interferometer 2020 Chin. Phys. B 29 070305

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