Small black/white hole stability and dark matter

Understand

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.