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Concept

Many-worlds interpretation

A depiction of the many-worlds interpretation of quantum mechanics, showing multiple Earth-like spheres interconnected by abstract lines against a starry background, symbolizing the branching of realities.

An interpretation of quantum mechanics introduced by Hugh Everett in his 1957 Princeton thesis. It removes wavefunction collapse from the theory: instead, every possible outcome of a quantum measurement is realised in a branch of a vast, ever-splitting universal wavefunction. The view is mathematically minimal and ontologically extravagant, and remains a serious contender among working physicists.

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