The pulse of an atom's magnetic heart as it ticks back and forth between quantum states has been timed in a laboratory. Physicists used a scanning tunneling microscope to observe electrons as they ...

Physicists in Germany say they have measured the correlated behaviour of atoms in molecules prepared in their lowest quantum energy state for the first time. Using a technique known as Coulomb ...

They discovered that the birth time of the electron that flies away is technically unknown. It simultaneously exists in a quantum state where it departs at both an earlier and later time-on ...

A group of physicists has measured gravity using the effects of time dilation — the slowing of time imparted by increased velocity or gravitational force — on atoms.

An atomic clock measured how general relativity warps time across a millimeter The record-breaking result reveals the incredible precision achievable by atomic clocks ...

Scientists have measured the shortest unit of time ever, the time it takes for a particle of light to cross a hydrogen molecule.