${}^{171}$Yb${}^{+}$ optical clock with $2.2\times 10^{-18}$ systematic uncertainty and absolute frequency measurements

Alexandra Tofful, Charles F. A. Baynham, E. Anne Curtis +9

A full evaluation of the uncertainty budget for the ytterbium ion optical clock at the National Physical Laboratory (NPL) was performed on the electric octupole (E3) $^2\mathrm{S}_…