Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-06
Eur.Phys.J.C54:319-323,2008
Physics
High Energy Physics
High Energy Physics - Theory
8 pages, revised, title changed, to appear in Eur. Phys. J. C
Scientific paper
10.1140/epjc/s10052-008-0529-2
Given the insight steming from string theory, the origin of the black-hole (BH) information puzzle is traced back to the assumption that it is physically meaningful to trace out the density matrix over negative-frequency Hawking particles. Instead, treating them as virtual particles necessarily absorbed by the BH in a manner consistent with the laws of BH thermodynamics, and tracing out the density matrix only over physical BH states, the complete evaporation becomes compatible with unitarity.
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