Optical lattice clocks are devices that measure the passing of time via the frequency of light that is absorbed or emitted by ...

Quantum timekeeping is supposed to be the ultimate in efficiency, with tiny devices that tick using the rules of quantum ...

Observing the flow of time at the quantum scale reveals a puzzling energy phenomenon: the energy required to simply read the ...

“Quantum clocks running at the smallest scales were expected to lower the energy cost of timekeeping, but our new experiment ...

Scientists built a tiny clock from single-electron jumps to probe the true energy cost of quantum timekeeping. They ...

Researchers from six countries conducted the largest coordinated comparison of optical clocks to date. The measurements amount to the largest coordinated comparison of optical clocks to date, and ...

Clocks have always been about control, as well as the mere measurement of time. They set the rules of the day, summon people ...

The white pickup truck pulls up to a decommissioned space observatory on top of Mount Blue Sky, one of Colorado’s famous “14ers,” mountains that reach more than 14,000 feet high. The scene is stark on ...

In a cafe at CERN in 1992, three physicists realized they disagreed about how many constants are needed to describe all of nature. A recent paper suggests only one – time – is necessary.

WASHINGTON — Daylight saving time is coming to an end for 2025 this weekend. Clocks will "fall back" one hour at 2 a.m. on Nov. 2, the first Sunday in November, granting most people an extra hour of ...

The steady tick of a clock usually feels simple and dependable. Something swings or vibrates in a controlled rhythm and marks ...