title: Test of Equivalence Principle at 10(-8) Level by a Dual-Species Double-Diffraction Raman Atom Interferometer.
abstract: We report an improved test of the weak equivalence principle by using a simultaneous 85Rb-87Rb dual-species atom interferometer. We propose and implement a four-wave double-diffraction Raman transition scheme for the interferometer, and demonstrate its ability in suppressing common-mode phase noise of Raman lasers after their frequencies and intensity ratios are optimized. The statistical uncertainty of the experimental data for Eötvös parameter η is 0.8×10(-8) at 3200 s. With various systematic errors corrected, the final value is η=(2.8±3.0)×10(-8). The major uncertainty is attributed to the Coriolis effect.
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Shitong
authors.initials: S
authors.lastname: Long
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Biao
authors.initials: B
authors.lastname: Tang
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Fen
authors.initials: F
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Wencui
authors.initials: W
authors.lastname: Peng
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.|University of Chinese Academy of Sciences, Beijing 100049, China.
authors.forename: Weitao
authors.initials: W
authors.lastname: Duan
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Jiaqi
authors.initials: J
authors.lastname: Zhong
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Zongyuan
authors.initials: Z
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Wang
authors.affiliation: Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Yuanzhong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences - Wuhan National Laboratory for Optoelectronics, Wuhan 430071, China.|Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China.
authors.forename: Mingsheng
authors.initials: M
authors.lastname: Zhan