An atomic clock is known to be the most accurate measurement ... See real-time clock and atom. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

R esearchers have developed a new approach in optical atomic clocks that brings forth a major goal in science: the redefinition of a second. The fundamental unit of time could soon be based on ...

We normally think of atomic clocks as the gold standard in timekeeping. The very definition of a second — in modern times, at least — is 9,192,631,770 periods of the radiation corresponding to ...

The next generation of atomic clocks "ticks" with the frequency of ... They will therefore become the future basis for the worldwide definition of the second in the International System of Units ...

The size, power, and other metrics of a latest-generation chip-scale atomic clock.