Now a Japanese company has commercialized one approach—an optical-lattice clock it claims is the most accurate on the market.

The European Space Agency (ESA) has launched ACES, or the Atomic Clock Ensemble in Space, to the International Space Station ...

The optical lattice clock, which carries a price tag of 500 million yen ($3.3 million), is up to 100 times more precise than the cesium atomic clock that is currently used for time definition.

“Because visible light has a frequency that is five orders of magnitude higher than microwaves, optical clocks are about 100 times more accurate than the current standard of caesium atomic ...

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National Institute for Standards and Technology, “NIST-F1 Cesium Fountain Atomic Clock.” EE World Online, “The PC-board atomic clock, Part 2: The CSAC design.” EE World Online ...

Atomic clocks are timekeeping devices that use the vibrations of atoms (commonly cesium, rubidium, or hydrogen) as their ...

At the heart of the mission are two advanced atomic clocks. One is PHARAO (Projet d’Horloge Atomique à Refroidissement d’Atomes en Orbite), a cesium-based clock designed to be compact in ...