Information-preserving black holes still do not preserve baryon number and other effective global quantum numbers
arXiv:gr-qc/0604072 · doi:10.1142/S0218271805007875
Abstract
It has been claimed recently that the black hole information-loss paradox has been resolved: the evolution of quantum states in the presence of a black hole is unitary and information preserving. We point out that, contrary to some claims in literature, information-preserving black holes still violate baryon number and any other quantum number which follows from an effective (and thus approximate) or anomalous symmetry.
arXiv commentHonorable Mention on Gravity Essay Competition 2005; Published in the special Essay issue of Int.J.Mod.Phys
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