Study of optical clocks based on ultracold ^171Yb atoms  

作　　者：Di Ai Hao Qiao Shuang Zhang Li-Meng Luo Chang-Yue Sun Sheng Zhang Cheng-Quan Peng Qi-Chao Qi Tao-Yun Jin Min Zhou Xin-Ye Xu 艾迪;谯皓;张爽;骆莉梦;孙常越;张胜;彭成权;齐启超;金涛韫;周敏;徐信业(State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China)

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China [2]Shanghai Research Center for Quantum Sciences,Shanghai 201315,China

出　　处：《Chinese Physics B》2020年第9期79-83,共5页中国物理B（英文版）

基　　金：Project supported by the National Key Basic Research and Development Program of China(Grant Nos.2016YFA0302103,2017YFF0212003,and 2016YFB0501601);the Municipal Science and Technology Major Project of Shanghai,China(Grant No.2019SHDZX01);the National Natural Science Foundation of China(Grant No.11134003);the Excellent Academic Leaders Program of Shanghai,China(Grant No.12XD1402400).

摘　　要：The optical atomic clocks have the potential to transform global timekeeping,relying on the state-of-the-art accuracy and stability,and greatly improve the measurement precision for a wide range of scientific and technological applications.Herein we report on the development of the optical clock based on 171Yb atoms confined in an optical lattice.A minimum width of 1.92-Hz Rabi spectra has been obtained with a new 578-nm clock interrogation laser.The in-loop fractional instability of the 171Yb clock reaches 9.1×10-18 after an averaging over a time of 2.0×104 s.By synchronous comparison between two clocks,we demonstrate that our 171Yb optical lattice clock achieves a fractional instability of 4.60×10-16/√τ.

关 键 词：cold ytterbium atoms optical clocks ultra-stable clock lasers clock-transition spectra instability and uncertainty 

分 类 号：TH714.14[机械工程—测试计量技术及仪器]