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Many-worlds interpretation

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Standard quantum mechanics is made of two parts: a part that describes the unitary and deterministic evolution of a state vector, and a part that describes how a state vector randomly collapses when subjected to "measurement".

The many-worlds interpretation (MWI) cuts away the latter part. It uses decoherence to explain how the universe splits into many separate branches, each of which looks like it came out of a random collapse.

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