¹⁷⁶Lu⁺ clock comparison at the 10^-18 level via correlation spectroscopy.

ABSTRACT: The extreme precision of optical atomic clocks has led to an anticipated redefinition of the second by the International System of Units. Furthermore, accuracies pushing the boundary of 1 part in 10¹⁸ and beyond will enable new applications, such as in geodesy and tests of fundamental physics. The ¹S₀ to ³D₁ optical transition in ¹⁷⁶Lu⁺ has exceptionally low sensitivity to external perturbations, making it suitable for practical clock implementations with inaccuracy at or below 10^-18. Here, we perform high-accuracy comparisons between two ¹⁷⁶Lu⁺ references using correlation spectroscopy. A comparison at different magnetic fields is used to obtain a quadratic Zeeman co

SUBMITTER: Zhiqiang Z 

PROVIDER: S-EPMC10156108 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature