The National Institute of Standards and Technology's new cesium fountain clock is one of the most precise atomic clocks ever ...

On a campus in Boulder, Colorado, time just became a little more exact. Inside the National Institute of Standards and ...

Clocks on Earth are ticking a bit more regularly thanks to NIST-F4, a new atomic clock at the National Institute of Standards ...

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 ...

With access to a 10-MHz timebase from a cesium fountain atomic clock — no less a clock than the one that’s used to define the SI second, by the way — [Daniel] looked for ways to sync the ...

Whether you find yourself glancing at a clock on the wall or checking your phone, the time you constantly see is the product of a meticulous system upheld by the world’s timekeepers. In the U.S., a ...

We normally think of atomic clocks ... state of a stationary cesium-133 atom at a temperature of 0K. But there is a move to replace that definition using optical clocks that are 100 times more ...

“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 ...

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.

A Special Kind of Clock Cesium fountain clocks such as NIST-F4 are a type of atomic clock — a complex, high-precision device that extracts timing pulses from atoms. These clocks play a critical ...