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Ultracold atom and its application in precision measurement|1 Article(s)
Study of optical clocks based on ultracold 171Yb atoms
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, and Xin-Ye Xu
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. 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.
Chinese Physics B
- Publication Date: Jan. 01, 2020
- Vol. 29, Issue 9, (2020)
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