Lutetium Atomic Clock Achieves Record-Breaking Accuracy, Setting New Benchmark for Timekeeping

Scientists at the Centre for Quantum Technologies (CQT) at the National University of Singapore have developed an atomic clock using lutetium that has set a new record for timekeeping accuracy. The clock measured its transition frequency to 19 decimal places, achieving an uncertainty of 1 × 10⁻¹⁹, the lowest reported for any optical atomic clock to date. This breakthrough could influence future time standards and gravity measurements.