Where has all the information gone?
arXiv:gr-qc/0507051 · doi:10.1016/j.physleta.2005.05.065
Abstract
The existence of spacetime singularities is irrelevant for the irreversible appearance of black holes. However, confirmation of the latter's unitary dynamics would require the preparation of a coherent superposition of a tremendous number of appropriate ``Everett worlds''.
10 pages, 1 figure, Latex - Invited paper for a special Einstein issue of Physics Letters A