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We tend to think quantum tunnelling is a subatomic curiosity, but in 1984 and 1985 physicists at UC Berkeley showed that a superconducting electrical circuit big enough to hold in your hand could tunn

A look at the Berkeley superconducting circuit experiments that demonstrated macroscopic quantum tunnelling and energy quantisation, later recognised by the 2025 Nobel Prize in Physics. Quantum tunnelling is usually introduced through the smallest things physics can describe: an alpha particle escaping a nucleus, an electron crossing a barrier, a particle appearing where ordinary intuition says it should not be. The language makes i... [9113 chars]

We tend to think quantum tunnelling is a subatomic curiosity, but in 1984 and 1985 physicists at UC Berkeley showed that a superconducting electrical circuit big enough to hold in your hand could tunn

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