In the final analysis, by showing that 10 heterogenous clocks across three continents could agree with each other to within a ...

Over the last several years, researchers have shown that it is possible to design clocks 1,000 times more precise than the atomic clocks that the original definition of the second is based on.

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

Atomic clocks use these frequencies — specifically, absorbing and emitting photons at regular intervals to keep time. They are the most accurate clock we have to measure time in seconds.

The next generation of atomic clocks "ticks" with the frequency of a laser. This is about 100,000 times faster than the microwave frequencies of the cesium clocks which are generating the second ...

While the definition of a “clock” is scientifically hazy, the prototype is not yet used to measure time. So it technically should be called a “frequency standard,” physicist Jun Ye says.

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change. ... then future clocks could be added to the definition as needed.

They're called hydrogen masers, and they are extremely important atomic clocks. Along with around 400 others, placed all around the globe, they help the world define what time it is, right now ...

This reliable oscillation became the basis of the first atomic clocks developed in the 1940s and 1950s, and in 1967 the international organization that oversees standards for weights and measures ...