Two atomic clocks have been quantum entangled for the first time

Researchers have entangled atomic clocks allowing them to synchronise them more accurately. Such entangled clocks could be used study dark matter and gravity more precisely

Physics 7 September 2022

Atomic clock

原子钟使用激光和原子来记录时间extremely accurately

Andrew Brookes/National Physical Laboratory/Science Photo Library

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

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

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