Improved absolute frequency measurement of the 171Yb optical lattice clock at KRISS relative to the Si second

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Abstract

We measured the absolute frequency of the 1S0-3P0 transition of 171Yb atom confined in a one-dimensional optical lattice relative to the SI second. The determined frequency was 518 295 836 590 863.38(57) Hz. The uncertainty was reduced by a factor of 14 compared with our previously reported value in 2013 due to the significant improvements in decreasing the systematic uncertainties. This result is expected to contribute to the determination of a new recommended value for the secondary representations of the second.

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Kim, H., Heo, M. S., Lee, W. K., Park, C. Y., Hong, H. G., Hwang, S. W., & Yu, D. H. (2017). Improved absolute frequency measurement of the 171Yb optical lattice clock at KRISS relative to the Si second. Japanese Journal of Applied Physics, 56(5). https://doi.org/10.7567/JJAP.56.050302

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