Raman-pulse-duration effect in gravity gradiometers composed of two atom interferometers

作     者：Cheng-Gang Shao De-Kai Mao Min-Kang Zhou Yu-Jie Tan Le-Le Chen Jun Luo Zhong-Kun Hu 

作者机构：[]Key Laboratory of Fundamental Physical Quantities Measurement of Ministry of Education School of Physics Huazhong University of Science and Technology Wuhan 430074 People's Republic of China 

出 版 物：《Physical Review A》 (物理学评论A辑：原子、分子和光学物理学)

年 卷 期：2015年第92卷第5期

页      面：053613-053613页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China [11275075, 41127002] Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, China [Y4KF121CJ1] 

主　　题：PULSE-width modulation RESEARCH GRAVIMETERS (Geophysical instruments) ATOM interferometers GRAVITATIONAL fields RAMAN lasers 

摘      要：We investigated the Raman-pulse-duration effect in a gravity gradiometer with two atom interferometers. Since the two atom clouds in the gradiometer experience different gravitational fields, it is hard to compensate for the Doppler shifts of the two clouds simultaneously by chirping the frequency of a common Raman laser. This leads to an appreciable phase shift. The magnitude of the phase shift relative to the differential phase shift of the two interferometers is in an order of τ/T, and cannot be neglected in the precision measurements such as measuring the gravity gradient and the Newtonian gravitational constant.