| many-worlds interpretation | The view of quantum mechanics holding that a physical system simultaneously exists in all of its possible states prior to and after a measurement of the system. In the many-worlds interpretation, each of these simultaneous existences is part of a separate universe. Every time we make a measurement of a physical system and find it to be in a particular one of its possible states, our universe branches off to one of the universes in which the system is in that particular state at that moment. The system, however, continues to exist in its other possible states, in parallel universes. | Copenhagen interpretation | Everett and Wheeler | | quantum mechanics interpretation |
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