Paper: https://www.nature.com/articles/s41586-023-06550-2 https://www.nature.com/articles/s41586-023-06550-2 (not open access) "50 trillionth of a second" (50x

Paper: https://www.nature.com/articles/s41586-023-06550-2 https://www.nature.com/articles/s41586-023-06550-2 (not open access) "50 trillionth of a second" (50x10^-12s) are 0.05 ns by the way.