Single-Ion Atomic Clock with $3\times 10^{-18}$ Systematic Uncertainty

N. Huntemann, C. Sanner, B. Lipphardt +2

We experimentally investigate an optical frequency standard based on the ${}^2{S}_{1/2}(F=0)\to {}^2{F}_{7/2}(F=3)$ electric octupole (\textit{E}3) transition of a single trapped $^{17…