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

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 ...

Known as a "strontium optical lattice clock," it is 100 times more accurate than caesium atomic clocks, the current standard for defining seconds, the precision-equipment producer said in a statement.

But there is a move to replace that definition using optical clocks that are 100 times more accurate than a standard atomic clock. In recent news, the Boulder Atomic Clock Optical Network ...

Known as a "strontium optical lattice clock", it is 100 times more accurate than caesium atomic clocks, the current standard for defining seconds, the precision-equipment producer said in a statement.

The Doomsday Clock is a metaphor that represents how close humanity is to self-destruction, due to nuclear weapons and climate change. The clock hands are set by the Bulletin of the Atomic Scientists, ...

A feedback loop is also used to stabilize the 578-nm laser frequency to the clock transition. Absolute frequency measurements are carried out relative to a local caesium-fountain primary frequency ...

Known as a “strontium optical lattice clock”, it is 100 times more accurate than caesium atomic clocks, the current standard for defining seconds, the precision-equipment producer said in a ...

Known as a "strontium optical lattice clock", it is 100 times more accurate than caesium atomic clocks, the current standard for defining seconds, the precision-equipment producer said in a statement.