Study of optical clocks based on ultracold 171Yb atoms

doi:10.1088/1674-1056/aba099

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
Accepted manuscript online: 29 June 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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Study of optical clocks based on ultracold ¹⁷¹Yb atoms