Read article: New definition of second ticks closer after international optical-clock comparison Metrology Research update New definition of second ticks closer after international optical-clock comparison Fibre and satellites connections span two continents
Read article: The evolution of the metre: How a product of the French Revolution became a mainstay of worldwide scientific collaboration Metrology Blog The evolution of the metre: How a product of the French Revolution became a mainstay of worldwide scientific collaboration Physics World corresponding editor Isabelle Dumé reports from a Paris symposium celebrating the 150th anniversary of the Metre Convention
Read article: Magnetically launched atoms sense motion Metrology Research update Magnetically launched atoms sense motion New method in atom interferometry is used for inertial sensing
Read article: Thermometer uses Rydberg atoms to make calibration-free measurements Metrology Research update Thermometer uses Rydberg atoms to make calibration-free measurements New technique uses black-body radiation to make direct measurements with low uncertainty
Read article: New candidate emerges for a universal quantum electrical standard Metrology Research update New candidate emerges for a universal quantum electrical standard Approach based on the quantum anomalous Hall effect does away with the need for applied magnetic fields
Read article: Solid-state nuclear clocks brought closer by physical vapour deposition Metrology Research update Solid-state nuclear clocks brought closer by physical vapour deposition Fabrication technique reduces amount of expensive isotope needed
Read article: Multi-qubit entangled states boost atomic clock and sensor performance Quantum Research update Multi-qubit entangled states boost atomic clock and sensor performance Greenberger–Horne–Zeilinger states increase measurement frequency
Read article: Nuclear clock ticks ever closer Metrology Research update Nuclear clock ticks ever closer New device could not only be the best time-keeper ever, it could also revolutionize fundamental physics studies
Read article: The most precise timekeeping device ever built Metrology Analysis The most precise timekeeping device ever built Colorado-based researchers have reduced the systematic uncertainty in their optical lattice clock to a record low. Ali Lezeik explains how they did it
Read article: Atomic clocks on the Moon could create ‘lunar positioning system’ Telescopes and space missions Blog Atomic clocks on the Moon could create ‘lunar positioning system’ Lunar time standard would avoid pitfalls of time dilation