Investigation of the 6s6p 3P0-4f 135d6s2 (J=2) Clock Transition in 171Yb Atoms

作者:Qiao, Hao; Ai, Di; Sun, Chang-Yue; Peng, Cheng-Quan; Qi, Qi-Chao; Zhao, Cheng-Cheng; Luo, Li-Meng; Jin, Tao-Yun; Zhang, Tao; Zhou, Min; Xu, Xin-Ye*
来源:Physical Review X, 2024, 14(1): 011023.
DOI:10.1103/PhysRevX.14.011023

摘要

High-precision atomic spectroscopy provides an invaluable and sensitive tool for exploring a wide range of physical questions. Here, we investigate the forbidden optical transition of the 6s6p3P0 - 4f135d6s2 (J = 2) in 171Yb atoms at the wavelength of 1695 nm, which exhibits the highest sensitivity to the variation of the fine-structure constant alpha compared to the current neutral optical clock. We obtain high-resolution transition spectroscopy in a one-dimensional optical lattice, and the measurement of its absolute frequency achieves kHz-level accuracy. Meanwhile, several essential atomic constants are also determined, including the electric-dipole (E1) magic wavelengths, as well as the hyperpolarizabilities and tensor polarizabilities around the E1 magic wavelengths. Additionally, we derive the hyperfine constant for the J = 2 state from the measured absolute frequencies 1123 252.3 12.0 kHz, providing a sixfold enhancement in the uncertainty reduction compared to the recent result. We anticipate that this work will prompt further investigation of the additional clock transition at 1695 nm in 171Yb atoms. Together with the wellestablished 1S0-3P0 transition, many fundamental and new physics research, such as the time variation of alpha, ultralight dark-matter searches, Lorentz violation, etc., will enable new bounds and measurements with unprecedented precision.

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