Direct Comparison of Distant Optical Lattice Clocks at the $10^{-16}$ Uncertainty

Atsushi Yamaguchi, Miho Fujieda, Motohiro Kumagai +7

Fiber-based remote comparison of ${}^{87}$Sr lattice clocks in 24 km distant laboratories is demonstrated. The instability of the comparison reaches $5\times 10^{-16}$ over an averagi…