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physics.atom-ph2020★ 14 cited
Frequency Ratio Measurements with 18-digit Accuracy Using a Network of Optical Clocks
Boulder Atomic Clock Optical Network, Collaboration, : +35
Atomic clocks occupy a unique position in measurement science, exhibiting higher accuracy than any other measurement standard and underpinning six out of seven base units in the SI…
physics.atom-ph2018
Towards Adoption of an Optical Second: Verifying Optical Clocks at the SI Limit
W. F. McGrew, X. Zhang, H. Leopardi +13
The pursuit of ever more precise measures of time and frequency is likely to lead to the eventual redefinition of the second in terms of an optical atomic transition. To ensure con…