Tiny Asian country beats China, USA to world's most accurate clock — Lutetium-based device loses 1 second…
- Singapore's CQT reports two lutetium-ion clocks with record-evaluated uncertainties of 1.2 and 1.3 × 10⁻¹⁹, making them the most accurate atomic clocks to date
- The stated results top Wuhan's calcium clock (4.4 × 10⁻¹⁹) and NIST's aluminum clock (5.5 × 10⁻¹⁹) by a wide berth
- It lands days before the CGPM meets in Versailles, where a draft resolution admits no consensus on replacing cesium just yet
A team at the National University of Singapore (NUS) has put a single charged atom of lutetium at the top of the rankings for the world's most accurate clock.
The remarkable achievement was documented in a paper published in Nature, as researchers at NUS's Centre for Quantum Technologies (CQT) reported two lutetium-ion clocks with evaluated fractional uncertainties of 1.2 × 10⁻¹⁹ and 1.3 × 10⁻¹⁹, the lowest yet reported for any atomic clock.
"I am confident that what we have now is the...
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