Reading a quantum clock costs more energy than running it, study finds

Oxford UK (SPX) Nov 15, 2025

A study led by the University of Oxford has identified a surprising source of entropy in quantum timekeeping – the act of measurement itself. In a study published 14 Nov in Physical Review Letters, scientists demonstrate that the energy cost of reading a quantum clock far outweighs the cost of running it, with implications for the design of future quantum technologies.

Clocks, whether pend