https://www.live-feeds.com/feed/lu-optical-frequency-references-with-accuracy-verified-at-the-19th-digitContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/lu-optical-frequency-references-with-accuracy-verified-at-the-19th-digithttps://www.live-feeds.com/feed/lu-optical-frequency-references-with-accuracy-verified-at-the-19th-digit#u84810Sat, 26 Sep 2026 06:50:37 +0000Researchers at the Centre for Quantum Technologies (CQT) in Singapore have built a record-breaking atomic clock using lutetium ions. This optical frequency reference achieves accuracy verified at the 19th digit, making it the most precise timekeeping device ever created. The clock is so stable that it could potentially operate for 300 billion years before deviating by a single second. Its precision allows the device to detect how gravity influences the passage of time, providing a new tool for measuring gravitational shifts.Why it mattersAtomic clocks provide the fundamental timing for global