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Lutetium

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science15 days ago•53 min saved

Singapore team achieves 19-digit accuracy in lutetium atomic clock comparison

Researchers at the National University of Singapore (NUS) have developed a pair of optical atomic clocks using lutetium ions that achieve a fractional frequency uncertainty of 1 × 10⁻¹⁹. By comparing two independent systems over 200 hours, the team verified agreement to the 19th decimal place, marking a fourfold improvement over previous records. This precision enables millimeter-scale gravity measurements and supports the potential redefinition of the SI second.

via Nature|

#atomic-clocks #lutetium #nus

science-and-technology16 days ago•3 min saved

Singapore Researchers Unveil Lutetium Clock with Record 10^-19 Accuracy

Researchers at the National University of Singapore (NUS) have developed the world’s most accurate atomic clock, utilizing the rare-earth element lutetium. Published in Nature on September 23, 2026, the device achieves an uncertainty of 1 x 10^-19, meaning it would take over 260 billion years to lose a second. This optical clock is four times more precise than the previous record-holder based on calcium ions. The team verified its accuracy by comparing two independent clocks, which agreed to the 19th decimal place. The breakthrough, resulting from over a decade of work, could lead to a redefinition of the second and enable ultra-precise gravity mapping.

via Nature|

#atomic-clocks #lutetium #national-university-of-singapore