Quantum clocks built from randomness offer a new perspective on time, merging quantum mechanics with timekeeping and ...

New device emits photons in telecom fiber band from the start, so it avoids a separate converter that can waste photons.

Nuclear security specialist Sébastien Philippe, one of the 22 recipients of this year's prestigious MacArthur fellowship, ...

Abstract: We report on measurements of frequency shifts in a microwave cesium vapor cell atomic clock based on coherent population trapping (CPT). The dependence of the clock frequency on numerous ...

Every second of modern life runs on precision — from GPS navigation to the time signals that keep the internet in sync. But ...

MIT physicists improved the stability of optical atomic clocks by reducing “quantum noise” — a fundamental measurement ...

The new research controls the noise in atomic frequency to double the precision of atomic clocks for a more accurate time.

Optical clocks are highly precise timekeeping devices that measure time by tracking the oscillations of light, as opposed to microwaves, like conventional atomic clocks. The accuracy of these clocks ...

Your device does not support the audio. September 30th has long been a date marked by remarkable events throughout history, crossing continents and centuries. Don't miss our top stories and ...

Researchers collected and vaporized samples from fossilized eggshells in China's Qinglongshan fossil reserve. They calculated how old the eggs were by measuring accumulated lead and uranium atoms in ...