![]() ![]() Bryce DeWitt popularized the formulation and named it many-worlds in the 1970s. Many-worlds is also called the relative state formulation or the Everett interpretation, after physicist Hugh Everett, who first proposed it in 1957. In contrast to some other interpretations, such as the Copenhagen interpretation, the evolution of reality as a whole in MWI is rigidly deterministic : 9 and local. This implies that all possible outcomes of quantum measurements are physically realized in some "world" or universe. ![]() The many-worlds interpretation ( MWI) is an interpretation of quantum mechanics that asserts that the universal wavefunction is objectively real, and that there is no wave function collapse. ![]() In this interpretation, every quantum event is a branch point the cat is both alive and dead, even before the box is opened, but the "alive" and "dead" cats are in different branches of the multiverse, both of which are equally real, but which do not interact with each other. The quantum-mechanical " Schrödinger's cat" paradox according to the many-worlds interpretation. ![]()
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