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Quantum mechanics

Quantum mechanics

Quantum-tunnelling time is measured using ultracold atoms

22 Jul 2020
Quantum clock
Quantum clock: rotating atomic spins have been used to measure the time it takes for quantum tunnelling to occur. (Courtesy: iStock/agsandrew)
The time it takes for an atom to quantum-mechanically tunnel through an energy barrier has been meas

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Philip Ball is a science writer based in the UK and author of Beyond Weird: Why Everything You Thought You Knew About Quantum Physics is Different
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