Xiao-Bing Deng(邓小兵), Xiao-Chun Duan(段小春), De-Kai Mao(毛德凯), Min-Kang Zhou(周敏康), Cheng-Gang Shao(邵成刚), and Zhong-Kun Hu(胡忠坤)^†
MOE Key Laboratory of Fundamental Physical Quantities Measurements, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
(Received 15 November 2016; revised manuscript received 25 January 2017; published online 20 February 2017)

We theoretically investigate the application of the fringe-locking method (FLM) in the dual-species quantum test of the weak equivalence principle (WEP). With the FLM, the measurement is performed invariably at the midfringe, and the extraction of the phase shift for atom interferometers is linearized. For the simultaneous interferometers, this linearization enables a good common-mode rejection of vibration noise, which is usually the main limit for high precision WEP tests of the dual-species kind. We note that this method also allows for an unbiased determination of the gravity accelerations difference, which meanwhile is ready to be implemented.

Chin. Phys. B Vol. 26, No. 4 (2017) 043702      DOI: 10.1088/1674-1056/26/4/043702