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[QUOTE="PaleMoon, post: 6032739, member: 647294"] What do you think about Susskind's sentence: in quantum mechanics informationd can never be lost? this is the core of his conclusion i read this "The first merit of Maldacena's work has been to solve the paradox of information, at least in the particular case of a black hole in AdS5. The latter is indeed equivalent to a hot plasma on the boundary, characterized by the temperature of Hawking TH and described by a gauge theory; both have the same entropy. In addition, plasma obeys the usual [URL='https://www.physicsforums.com/insights/the-7-basic-rules-of-quantum-mechanics/']Rules of Quantum Mechanics[/URL], and in particular it evolves unitarily, which automatically leads the black hole to evolve also unitarily and to respect the principles of quantum mechanics [6]. This result led Hawking to revise its position and to announce in 2005 that the paradox was indeed solved by the AdS / CFT correspondence for the conservation of information." this is written by Jean Pierre Luminet any collapse would break the unitarity. so physicists insist on the fact that unitarity is a law of quantum field theory. one often read that states evolve unitarily except when they do not... [/QUOTE]
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