Extended Data Fig. 4: Comparison of bias correction.
From: Differential clock comparisons with a multiplexed optical lattice clock

a, b, Comparison of ‘closed-loop’ analysis with (a) and without (b) bias correction. 197 unique ‘closed-loop’ combinations are shown, with each datum corresponds to the sum frequency within each loop. Shaded area represents a window of 1 × 10−18.