Micro-Gal level gravity measurements with cold atom interferometry*
Zhou Min-Kang, Duan Xiao-Chun, Chen Le-Le, Luo Qin, Xu Yao-Yao, Hu Zhong-Kun†
       
(a) Schematic of a two-wave atom interferometer. (b) Raman-type atom interferometer, the upper and lower enclosed areas correspond to without and with gravity, respectively.