Quantum clocks break energy limits, unlocking ultra-precise timekeeping with far-reaching tech, AI, and navigation impacts.

“The optical clock community is strongly motivated to obtain the best possible set of measurements before the SI second is ...

They concluded that the performance of their OFD system is sufficient to support an atomic reference with stability better than the commercially available cesium clock that has frequency ...

A new atomic clock at the National Institute of Standards and Technology in Boulder is helping researchers count seconds to ensure the world is on time.

That clock, called the Atomic Clock Ensemble in Space, or ACES, launched into orbit from Florida last month, bound for the International Space Station.

From space, the Atomic Clock Ensemble in Space will link to some of the most accurate clocks on Earth to create a synchronized network, which will support tests of fundamental physics.

A new atomic clock is one of the world’s best timekeepers, researchers say — and after years of development, the “fountain”-style clock is now in use helping keep official U.S. time. Known ...

The way time is measured is on the edge of a historic upgrade. At the heart of this change is a new kind of atomic clock that uses light instead of microwaves. This shift means timekeeping could ...

According to scientists at NIST in Boulder, their newest atomic clock, the NIST-F4, will help track time more precisely and help put global time on a more accurate frequency.

The European Space Agency (ESA) is getting ready for the launch of an atomic clock system that aims to validate elements of Einstein’s theory of general relativity but could have implications ...

The atomic clock provides initial accuracy of ±0.5 parts per billion (ppb), low frequency-drift performance under 0.9 ppb/month, and maximum temperature-induced errors below ±0.3 ppb.

Atomic clocks have long been the gold standard for measuring time and frequency. Among them, optical clocks—using atoms like strontium or aluminum—have reached staggering levels of accuracy ...