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Chin. Phys. B, 2020, Vol. 29(9): 090601    DOI: 10.1088/1674-1056/aba099
Special Issue: SPECIAL TOPIC — Ultracold atom and its application in precision measurement
SPECIAL TOPIC—Ultracold atom and its application in precision measurement Prev   Next  

Study of optical clocks based on ultracold 171Yb atoms

Di Ai(艾迪)1, Hao Qiao(谯皓)1, Shuang Zhang(张爽)1, Li-Meng Luo(骆莉梦)1, Chang-Yue Sun(孙常越)1, Sheng Zhang(张胜)1, Cheng-Quan Peng(彭成权)1, Qi-Chao Qi(齐启超)1, Tao-Yun Jin(金涛韫)1, Min Zhou(周敏)1, Xin-Ye Xu(徐信业)1,2
1 State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China;
2 Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
Abstract  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.
Keywords:  cold ytterbium atoms      optical clocks      ultra-stable clock lasers      clock-transition spectra      instability and uncertainty  
Received:  09 May 2020      Revised:  08 June 2020      Published:  05 September 2020
PACS:  06.30.Ft (Time and frequency)  
  32.30.-r (Atomic spectra?)  
  32.70.Jz (Line shapes, widths, and shifts)  
  37.10.Jk (Atoms in optical lattices)  
Fund: 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), and the Excellent Academic Leaders Program of Shanghai, China (Grant No. 12XD1402400).
Corresponding Authors:  Xin-Ye Xu     E-mail:  xyxu@phy.ecnu.edu.cn

Cite this article: 

Di Ai(艾迪), Hao Qiao(谯皓), Shuang Zhang(张爽), Li-Meng Luo(骆莉梦), Chang-Yue Sun(孙常越), Sheng Zhang(张胜), Cheng-Quan Peng(彭成权), Qi-Chao Qi(齐启超), Tao-Yun Jin(金涛韫), Min Zhou(周敏), Xin-Ye Xu(徐信业) Study of optical clocks based on ultracold 171Yb atoms 2020 Chin. Phys. B 29 090601

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