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.
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Francesca Vidotto, Carlo Rovelli. White-hole dark matter and the origin of past low-entropy. 2018. ⟨hal-01771746⟩

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