The black hole information paradox is a paradox that results from the combination of quantum mechanics and general relativity. It suggests that physical information could permanently disappear in a black hole, allowing many physical states to evolve into the same state. This is controversial because it violates a commonly assumed tenet of science—that in principle complete information about a physical system at one point in time should determine its state at any other time. A fundamental postulate of quantum mechanics is that complete information about a system is encoded in its wave function up to when the wave function collapses. The evolution of the wave function is determined by a unitary operator, and unitarity implies that information is conserved in the quantum sense.
Other articles related to "black hole information paradox, information, black holes, black hole":
... Information is encoded in the correlations between future and past Advantage Semiclassical gravity is sufficient, i.e ...
... Hawking's calculation suggested that the radiation which black holes emit is not related in any way to the matter that they absorb ... The outgoing light rays start exactly at the edge of the black hole and spend a long time near the horizon, while the infalling matter only reaches the horizon much later ... Hawking interpreted this to mean that when black holes absorb some photons in a pure state described by a wave function, they re-emit new photons in a thermal mixed state described by a ...
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