Random Quantum Clocks to Probe the Foundations of Time
Quantum clocks built from randomness offer a new perspective on time, merging quantum mechanics with timekeeping and challenging classical physics concepts.
In 2025, a team of physicists led by Mark Mitchison at King’s College London reported a striking new development in our understanding of time: the creation of clocks built not from oscillations or resonance, but from pure quantum randomness.
Their results, published in Physical Review X (2025), demonstrate how intrinsically unpredictable events at the quantum level can be harnessed to measure the passage of time.
The team designed an experiment that used entangled particles, such as electrons and photons, arranged in pairs. The correlations between their outcomes, governed by the probabilistic rules of quantum mechanics, were converted into “ticks” of a novel clock.
Image Credit: Oleh Liubimtsev/Shutterstock.com
Author summary: Physicists create quantum clocks from randomness.
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