Correction to: Nature https://doi.org/10.1038/s41586-021-03988-0Published online 17 November 2021

In the version of this Article initially published, an error appeared in the third sentence of the Methods section. A stray character “F” appeared to the right of the close bracket at the end of the equation in the sentence now reading “Pseudospins are encoded in the two-clock ground hyperfine states, with |F = 0, mF = 0 = |↓z and |F = 1, mF = 0 = |↑z, where F and mF are the quantum numbers for the total angular momentum and the component along z, respectively.”

The original Article has been corrected online.