11 Facts About Many-worlds interpretation

Many-worlds interpretation is an interpretation of quantum mechanics that asserts that the universal wavefunction is objectively real, and that there is no wave function collapse.

Many-worlds interpretation implies that there are most likely an uncountably infinite number of universes.

Key idea of the many-worlds interpretation is that the unitary dynamics of quantum mechanics applies everywhere and so describes the whole universe.

Many-worlds interpretation makes use of decoherence to explain the measurement process and the emergence of a quasi-classical world.

Many-worlds interpretation is DeWitt's popularisation of Everett, who had referred to the combined observer–object system as split by an observation, each split corresponding to the different or multiple possible outcomes of an observation.

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Since the Copenhagen Many-worlds interpretation requires the existence of a classical domain beyond the one described by quantum mechanics, it has been criticized as inadequate for the study of cosmology.

Many-worlds interpretation argued that for a composite system—such as a subject observing an object —the claim that either the observer or the observed has a well-defined state is meaningless; in modern parlance, the observer and the observed have become entangled: we can only specify the state of one relative to the other, i e, the state of the observer and the observed are correlated after the observation is made.

Many-worlds interpretation's derivation has been criticized as relying on unmotivated assumptions.

Many-worlds interpretation went on to assert that while the Schrodinger equation seemed to be describing several different histories, they were "not alternatives but all really happen simultaneously".

Many-worlds interpretation did just fine, garnering support on a level comparable to, but somewhat below, Copenhagen and decoherence.

Many-worlds interpretation's son reported that he "never wavered in his belief over his many-worlds theory".