Editing Many-worlds interpretation (section)

=== Support ===

One of the strongest longtime advocates of MWI is David Deutsch.<ref name="deutsch98">[[David Deutsch]], ''The Fabric of Reality: The Science of Parallel Universes And Its Implications'', Penguin Books (1998), {{ISBN|0-14-027541-X}}.</ref> According to him, the single photon interference pattern observed in the [[double slit experiment]] can be explained by interference of photons in multiple universes. Viewed this way, the single photon interference experiment is indistinguishable from the multiple photon interference experiment. In a more practical vein, in one of the earliest papers on quantum computing,<ref name="deutsch85">{{cite journal | last1 = Deutsch | first1 = David | author-link = David Deutsch | year = 1985 | title = Quantum theory, the Church–Turing principle and the universal quantum computer | journal = Proceedings of the Royal Society of London A | volume = 400 | issue = 1818| pages = 97–117 | doi=10.1098/rspa.1985.0070|bibcode = 1985RSPSA.400...97D | citeseerx = 10.1.1.144.7936 | s2cid = 1438116 }}</ref> Deutsch suggested that parallelism that results from MWI could lead to "a method by which certain probabilistic tasks can be performed faster by a universal quantum computer than by any classical restriction of it". He also proposed that MWI will be testable (at least against "naive" Copenhagenism) when [[Reversible computing|reversible computers]] become conscious via the reversible observation of spin.<ref name="davis86">[[Paul C.W. Davies]], J. R. Brown, ''The Ghost in the Atom'' (1986) {{ISBN|0-521-31316-3}}, pp. 34–38: "The Many-Universes Interpretation", pp. 83–105 for [[David Deutsch]]'s test of MWI and reversible quantum memories.</ref>