Researchers have shown, for the first time, that transmission of ultrastable optical signals from optical clocks across tens ...

Researchers have shown, for the first time, that transmission of ultrastable optical signals from optical clocks across tens of kilometers of deployed multicore fiber is compatible with simultaneous ...

The Defense Advanced Research Projects Agency has launched the Optical-Atomic System Integration and Calibration, or OASIC, ...

A new study published in Nature Physicsreveals a significant breakthrough in quantum timekeeping, challenging a long-held assumption about the link between energy consumption and clock accuracy.

BOULDER, Colo. — A new cesium fountain atomic clock at the National Institute of Standards and Technology (NIST) in Boulder is making time more accurate by fractions of a second. It took a team of ...

A clock network would allow geodesists to compare the ticking of clocks all over the world. They could then use the variations in time to map Earth’s gravitational field much more precisely, and ...

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 result is a clock with a total a total systematic uncertainty of 2.2×10⁻¹⁶ — a precision that means it loses less than a second every 140 million years.

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 ...

🕰️ Evolution of Atomic Clocks 1949 – The First Atomic Clock Harold Lyons at the U.S. National Bureau of Standards (now NIST) developed the first atomic clock using the ammonia molecule.

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.