中国物理B ›› 2021, Vol. 30 ›› Issue (1): 13701-.doi: 10.1088/1674-1056/abbbee

所属专题: SPECIAL TOPIC — Ultracold atom and its application in precision measurement

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  • 收稿日期:2020-06-04 修回日期:2020-08-17 接受日期:2020-09-28 出版日期:2020-12-17 发布日期:2020-12-30

Cold atom clocks and their applications in precision measurements

Shao-Yang Dai(戴少阳)1, Fa-Song Zheng(郑发松)1,2, Kun Liu(刘昆)1, Wei-Liang Chen(陈伟亮)1, Yi-Ge Lin(林弋戈), Tian-Chu Li(李天初)1, and Fang Fang(房芳)1,†   

  1. 1 National Institute of Metrology (NIM), Beijing 100029, China; 2 The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • Received:2020-06-04 Revised:2020-08-17 Accepted:2020-09-28 Online:2020-12-17 Published:2020-12-30
  • Contact: Corresponding author. E-mail: fangf@nim.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11873044), the National Key Research and Development Project of China (Grant No. 2016YFF0200202), and Consulting Research Project of Chinese Academy of Engineering (Grant No. 2018-ZCQ-03).

Abstract: Cold atom clocks have made remarkable progresses in the last two decades and played critical roles in precision measurements. Primary Cs fountain frequency standards have achieved a total uncertainty of a few parts in 1016, and the best optical clock has reached a type B uncertainty below 10-18. Besides applications in the metrology, navigation, etc., ultra-stable and ultra-accurate atomic clocks have also become powerful tools in the basic scientific investigations. In this paper, we focus on the recent developments in the high-performance cold atomic clocks which can be used as frequency standards to calibrate atomic time scales. The basic principles, performances, and limitations of fountain clocks and optical clocks based on signal trapped ion or neutral atoms are summarized. Their applications in metrology and other areas are briefly introduced.

Key words: atomic fountain clock, optical clock

中图分类号:  (Atoms in optical lattices)

  • 37.10.Jk
37.10.-x (Atom, molecule, and ion cooling methods) 95.55.Sh (Auxiliary and recording instruments; clocks and frequency standards)