White-hole dark matter and the origin of past low-entropy
Abstract
Recent results on the end of black hole evaporation give new weight to the hypothesis that a component of dark matter could be formed by remnants of evaporated black holes: stable Planck-size white holes with a large interior. The expected lifetime of these objects is consistent with their production at reheating. But remnants could also be pre-big bang relics in a bounce cosmology, and this possibility has strong implications on the issue of the source of past low entropy: it could realise a perspectival interpretation of past low entropy. The ideas briefly presented in this essay are developed in forthcoming papers.
Keywords
Cite
@article{arxiv.1804.04147,
title = {White-hole dark matter and the origin of past low-entropy},
author = {Carlo Rovelli and Francesca Vidotto},
journal= {arXiv preprint arXiv:1804.04147},
year = {2018}
}
Comments
Short entry. Essay written for the Gravity Research Foundation 2018 Awards for Essays on Gravitation. The ideas briefly introduced in this paper are developped in arXiv:1805.03872 and arXiv:1805.03224