Role of Various Entropies in the Black Hole Information Loss Problem

Details Role of Various Entropies in the Black Hole Information Loss Problem Role of Various Entropies in the Black Hole Information Loss Problem

2005-07-27

arxiv.org/abs/hep-th/0507272v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages

Scientific paper

In a recent paper Hawking has argued that there is no information loss in black holes in asymptotically AdS spacetimes. We remind that there are several types of information (entropy) in statistical physics -- fine grained (microscopic) and coarse grained (macroscopic) ones which behave differently under unitary evolution. We suggest that the coarse grained information of the rest of the Universe is lost while fine grained information is preserved. A possibility to develop in quantum gravity an analogue of the Bogoliubov derivation of the irreversible Boltzmann and Navier - Stokes equations from the reversible mechanical equations is discussed.

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