Math & science · 1982

Bell tests of entanglement

Aspect's experiments show quantum entanglement defies local explanation.

They tested Bell's 1964 inequality and found quantum predictions hold. The work, recognised with the 2022 Nobel, is the basis of quantum cryptography and computing.

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Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

Laser 1960
Quantum mechanics 1925

What it led to 1

Continental quantum networks ~2040

Related measurements

The dashed line marks when it first worked.

Selected gate-model quantum processors Latest: 1.12k physical qubits (2023) Source: Wikipedia: Timeline of quantum computing and communication; Wikipedia: List of quantum processors