This is intended to resolve some paradoxes of quantum theory, such as the EPR paradox and Schrödinger's cat, since every possible outcome of a quantum event exists in its own universe. ==History== In 1952, Erwin Schrödinger gave a lecture in Dublin in which at one point he jocularly warned his audience that what he was about to say might "seem lunatic".

Barrett and Peter Byrne, eds., "The Everett Interpretation of Quantum Mechanics: Collected Works 1955–1980 with Commentary", Princeton University Press, 2012. Julian Brown, Minds, Machines, and the Multiverse, Simon & Schuster, 2000, Sean M.

Wheeler made considerable efforts to formulate the theory in a way that would be palatable to Bohr, visited Copenhagen in 1956 to discuss it with him, and convinced Everett to visit as well, which happened in 1959.

Everett left academia in 1956, never to return, and Wheeler eventually disavowed the theory. One of MWI's strongest advocates is David Deutsch.

Many-worlds is also called the relative state formulation or the Everett interpretation, after physicist Hugh Everett, who first proposed it in 1957.

thesis "The Theory of the Universal Wavefunction", developed under his thesis advisor John Archibald Wheeler, a shorter summary of which was published in 1957 under the title "Relative State Formulation of Quantum Mechanics" (Wheeler contributed the title "relative state"; Everett originally called his approach the "Correlation Interpretation", where "correlation" refers to quantum entanglement).

Wheeler made considerable efforts to formulate the theory in a way that would be palatable to Bohr, visited Copenhagen in 1956 to discuss it with him, and convinced Everett to visit as well, which happened in 1959.

Bryce DeWitt popularized the formulation and named it many-worlds in the 1960s and 1970s. In many-worlds, the subjective appearance of wavefunction collapse is explained by the mechanism of quantum decoherence.

Bryce DeWitt popularized the formulation and named it many-worlds in the 1960s and 1970s. In many-worlds, the subjective appearance of wavefunction collapse is explained by the mechanism of quantum decoherence.

Decoherence approaches to interpreting quantum theory have been widely explored and developed since the 1970s, and have become quite popular.

In a 1983 interview, Hawking also said he regarded MWI as "self-evidently correct" but was dismissive of questions about the interpretation of quantum mechanics, saying, "When I hear of Schrödinger's cat, I reach for my gun." In the same interview, he also said, "But, look: All that one does, really, is to calculate conditional probabilities—in other words, the probability of A happening, given B.

And so, invoking Occam's razor, he removed the postulate of wavefunction collapse from the theory. ===Testability=== In 1985, David Deutsch proposed a variant of the Wigner's friend thought experiment as a test of many-worlds versus the Copenhagen interpretation.

They argue that macroscopic objects are significantly different from microscopic objects in not being isolated from the environment, and that using quantum formalism to describe them lacks explanatory and descriptive power and accuracy. === Polls === A poll of 72 "leading quantum cosmologists and other quantum field theorists" conducted before 1991 by L.

A section of his 1993 textbook had the title Everett's interpretation and other bizarre theories.

David Raub showed 58% agreement with "Yes, I think MWI is true". Max Tegmark reports the result of a "highly unscientific" poll taken at a 1997 quantum mechanics workshop.

Carroll's statement "As crazy as it sounds, most working physicists buy into the many-worlds theory", Michael Nielsen counters: "at a quantum computing conference at Cambridge in 1998, a many-worlder surveyed the audience of approximately 200 people...

Barrett, The Quantum Mechanics of Minds and Worlds, Oxford University Press, Oxford, 1999. Peter Byrne, The Many Worlds of Hugh Everett III: Multiple Universes, Mutual Assured Destruction, and the Meltdown of a Nuclear Family, Oxford University Press, 2010. Jeffrey A.

Barrett and Peter Byrne, eds., "The Everett Interpretation of Quantum Mechanics: Collected Works 1955–1980 with Commentary", Princeton University Press, 2012. Julian Brown, Minds, Machines, and the Multiverse, Simon & Schuster, 2000, Sean M.

Barrett, The Quantum Mechanics of Minds and Worlds, Oxford University Press, Oxford, 1999. Peter Byrne, The Many Worlds of Hugh Everett III: Multiple Universes, Mutual Assured Destruction, and the Meltdown of a Nuclear Family, Oxford University Press, 2010. Jeffrey A.

Barrett and Peter Byrne, eds., "The Everett Interpretation of Quantum Mechanics: Collected Works 1955–1980 with Commentary", Princeton University Press, 2012. Julian Brown, Minds, Machines, and the Multiverse, Simon & Schuster, 2000, Sean M.

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