Small black/white hole stability and dark matter

Carlo Rovelli (1) , Francesca Vidotto (2)

1 CPT - Centre de Physique Théorique - UMR 7332
2 UPV/EHU - Universidad del Pais Vasco / Euskal Herriko Unibertsitatea [Espagne]

We show that the expected lifetime of white holes formed as remnants of evaporated black holes is consistent with their production at reheating. We give a simple quantum description of these objects and argue that a quantum superposition of black and white holes with large interiors is stable, because it is protected by the existence of a minimal eigenvalue of the area, predicted by Loop Quantum Gravity. These two results support the hypothesis that a component of dark matter could be formed by small black hole remnants.

Mots clés: dark matter; remnants; white holes; loop quantum gravity; quantum gravity: loop space; black hole; stability; reheating; lifetime

Domaines: Relativité Générale et Cosmologie Quantique [gr-qc]

Carlo Rovelli, Francesca Vidotto. Small black/white hole stability and dark matter. Universe, 2018, 4 (11), pp.127. ⟨10.3390/universe4110127⟩. ⟨hal-01801853⟩