How does a clock become precise enough to guide a spacecraft across interstellar distance without drifting a single second ...
A clock built from thorium-229 has crossed an important line, from a long-discussed concept to a working device. The shift ...
Without a standard time system, clocks around Mars would all run on slightly different times.
A trapped cloud of ultracold atoms, colder than almost anything found in nature, has become the setting for a deceptively ...
In recent years, many physicists worldwide have introduced atomic clocks, systems to measure the passing of time that are based on quantum states of atoms. These clocks can have numerous valuable ...
Optical atomic clocks operate by tuning the frequency of a laser (optical local oscillator, OLO) into resonance with a narrowband electronic transition in an atomic system 4,5. By so doing, the ...