Information loss, made worse by quantum gravity?
Abstract
Quantum gravity is often expected to solve both the singularity problem and the information-loss problem of black holes. This article presents an example from loop quantum gravity in which the singularity problem is solved in such a way that the information-loss problem is made worse. Quantum effects in this scenario, in contrast to previous non-singular models, do not eliminate the event horizon and introduce a new Cauchy horizon where determinism breaks down. Although infinities are avoided, for all practical purposes the core of the black hole plays the role of a naked singularity. Recent developments in loop quantum gravity indicate that this aggravated information loss problem is likely to be the generic outcome, putting strong conceptual pressure on the theory.
Cite
@article{arxiv.1409.3157,
title = {Information loss, made worse by quantum gravity?},
author = {Martin Bojowald},
journal= {arXiv preprint arXiv:1409.3157},
year = {2015}
}
Comments
17 pages, 1 figure; v2: new footnotes, new appendices, new references, new question mark