Yao Huang

A team at the National University of Singapore built a single-ion optical clock from the rare-earth metal lutetium that is reported as the most accurate timekeeper yet, four times more accurate than the previous best calcium-ion clock, and verified it by comparing two lutetium clocks whose ticks matched to the 19th digit, a result published in Nature and framed as potentially underpinning a redefinition of the second and gravity mapping.

A team at the National University of Singapore built a single-ion optical clock from the rare-earth metal lutetium that is reported as the most accurate timekeeper yet, four times more accurate than the previous best calcium-ion clock, and verified it by comparing two lutetium clocks whose ticks matched to the 19th digit, a result published in Nature and framed as potentially underpinning a redefinition of the second and gravity mapping.