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Quantum black holes: Nonperturbative corrections and no-veil scenario
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A common belief is that further quantum corrections near the singularity of a large black hole should not substantially modify the semiclassical picture of black hole evaporation; in particular, the outgoing spectrum of radiation should be very close to the thermal spectrum predicted by Hawking. In this paper we explore a possible counterexample: in the context of dilaton gravity, we find that nonperturbative quantum corrections which are important in strong-coupling regions may completely alter the semiclassical picture, to the extent that the presumptive spacelike boundary becomes timelike, changing in this way the causal structure of the semiclassical geometry. As a result, only a small fraction of the total energy is radiated outside the fake event horizon; most of the energy comes in fact at later retarded times and there is no problem of information loss. This may constitute a general characteristic of quantum black holes, that is, quantum gravity might be such as to prevent the formation of global event horizons.
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RUSSO, J. g. (jorge guillermo). Quantum black holes: Nonperturbative corrections and no-veil scenario. _Physical Review D_. 1994. Vol. 49, núm. 10, pàgs. 5266-5277. [consulta: 21 de gener de 2026]. ISSN: 0556-2821. [Disponible a: https://hdl.handle.net/2445/12475]