Breakthrough could pave the way for next-generation GPS in drones, smartphones and self-driving cars, scientists say.

Atomic Digital Clock Auto Set (no back light) - Using radio frequencies broadcast ... Savings Time while set the DST on. Atomic Wall Clocks Battery Operated with Alarm - This digital calendar ...

They trapped thousands of strontium atoms vertically in grids of laser light. Atomic clocks rely on the steady frequency at which electrons in atoms transition between energy levels. Keeping a ...

Like the teeth of a comb, a microcomb consists of a spectrum of evenly distributed light frequencies. Optical atomic clocks can be built by locking a microcomb tooth to a ultranarrow-linewidth ...