Business is booming.

Two atomic clocks have been quantum entangled for the first time

Researchers have quantum entangled atomic clocks, which allow them to be synchronized more accurately. Such entangled clocks could be used to study dark matter and gravity more closely


September 7, 2022

Atomic clocks use lasers and atoms to record time with the utmost precision

Andrew Brookes/National Physical Laboratory/Science Photo Library

Two atomic clocks are connected using quantum entanglement – a property that intrinsically links them so that changes in one immediately affect the other. The connection makes it easier to synchronize the clocks, which could be used to make more accurate measurements of dark matter and gravity.

Atomic clocks are made up of atoms that are controlled very accurately by lasers. Each “tick” corresponds to a frequent and measurable change in energy that occurs in the electrons of the atoms. The result is …