Black Hole Metamorphosis and Stabilization by Memory Burden
Abstract
Systems of enhanced memory capacity are subjected to a universal effect of memory burden, which suppresses their decay. In this paper, we study a prototype model to show that memory burden can be overcome by rewriting stored quantum information from one set of degrees of freedom to another one. However, due to a suppressed rate of rewriting, the evolution becomes extremely slow compared to the initial stage. Applied to black holes, this predicts a metamorphosis, including a drastic deviation from Hawking evaporation, at the latest after losing half of the mass. This raises a tantalizing question about the fate of a black hole. As two likely options, it can either become extremely long lived or decay via a new classical instability into gravitational lumps. The first option would open up a new window for small primordial black holes as viable dark matter candidates.
Cite
@article{arxiv.2006.00011,
title = {Black Hole Metamorphosis and Stabilization by Memory Burden},
author = {Gia Dvali and Lukas Eisemann and Marco Michel and Sebastian Zell},
journal= {arXiv preprint arXiv:2006.00011},
year = {2022}
}
Comments
24 pages (2 column), 8 figures, 1 appendix; v2: added discussions of analytic understanding of our result (section III.C) and of role of number non-conservation (section IV) as well as minor improvements, matches published version; v3: added link to numerical data, minor updates of references and plots