description Many-worlds interpretation Overview
The many-worlds interpretation is an interpretation of quantum mechanics introduced by Hugh Everett in the 1950s. It treats the universal wave function as evolving continuously according to quantum dynamics and does not add a separate physical collapse during measurement. Through decoherence, different possible outcomes become effectively noninteracting branches, with observers in each branch recording a definite result; whether those branches should be described as separate worlds remains an interpretive question.
help Many-worlds interpretation FAQ
Who proposed the many-worlds interpretation of quantum mechanics?
The many-worlds interpretation was first proposed by American physicist Hugh Everett III in 1957. It was originally formulated as an alternative to the Copenhagen interpretation, which suggested that quantum wave functions collapse into a single state upon observation.
What does it mean for the universe to 'split' in this theory?
In the many-worlds interpretation, every time a quantum event has multiple possible outcomes, the universe branches into separate, non-interacting worlds. This implies that every possible outcome of a quantum measurement actually occurs in its own newly created, parallel universe.
Is the many-worlds interpretation proven by science?
No, the many-worlds interpretation is a theoretical framework and cannot be empirically proven because the parallel universes it describes are fundamentally impossible to observe. It remains one of several valid, hotly debated interpretations of quantum mechanics among physicists.
How does many-worlds differ from the Copenhagen interpretation?
The Copenhagen interpretation relies on an external observer causing a wave function to probabilistically collapse into a single physical state during measurement. In contrast, many-worlds argues that there is no collapse at all, but rather a deterministic splitting of realities.
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