Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which ...

Scientists have developed a "microcomb chip" — a 5 millimeter (0.2 inches) wide computer chip equipped with tiny teeth like those on a comb — that could make optical atomic clocks, the most precise ...

The size, power, and other metrics of a latest-generation chip-scale atomic clock.

A technological innovation could revolutionize the precision of navigation systems. A tiny device, shaped like a comb, ...

In a National Science Review perspective, the research progress and future challenges of nuclear optical clocks are presented ...

ESA's Atomic Clock Ensemble in Space (ACES) has arrived at NASA's Kennedy Space Center in Florida, United States. This ...