Correction to: Nature https://doi.org/10.1038/s41586-020-2641-xPublished online 2 September 2020

In this Article, owing to an error in the production process, the R value stated in Fig. 5b should be 0.914 instead of −0.914. In addition, in Extended Data Fig. 4a, b, the y axis should range from −4.0 to 4.0, rather than from −0.4 to 0.4. Finally, a minor typographical error was corrected in the Abstract. The Article has been corrected online.