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Many Worlds?Everett, Quantum Theory, and Reality$
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Simon Saunders, Jonathan Barrett, Adrian Kent, and David Wallace

Print publication date: 2010

Print ISBN-13: 9780199560561

Published to Oxford Scholarship Online: September 2010

DOI: 10.1093/acprof:oso/9780199560561.001.0001

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Apart from Universes

Apart from Universes

(p.542) 18 Apart from Universes
Many Worlds?

David Deutsch

Oxford University Press

A collection of classical universes — even if they interact — is still classical. For instance, it doesn't have entanglement; its elements don't have phases to their amplitudes; it doesn't have continuous motion of discrete observables. The multiverse is not classical: it consists of much more than universes. Research into what is there in addition has already been fruitful and promises to be more so. Progress in understanding the quantum world more deeply through such research is also the key to resolving the long-running scandal of the slow take-up of Everett's theory by physicists and philosophers.

Keywords:   parallel universe, dinosaurs, interpretation, explanation, quantum computing, information flow, cosmology

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