Ytterbium lattice clock with uncertainty of $1.1\times 10^{-18}$ and instability of low $10^{-19}$

Qiang Zhu, Jingran Shi, Yuechen Zhang +8

We report an optical lattice clock based on ${}^{171}$Yb atoms with a total systematic uncertainty of $1.1\times 10^{-18}$. In-vacuum buildup cavity was employed to enhance the latti…