Closer look at white hole remnants

The idea that, after their evaporation, Planck-mass black holes might tunnel into metastable white holes has recently been intensively studied. Those relics have been considered as a dark matter candidate. We show that the model is severely constrained and underline some possible detection paths. We also investigate, in a more general setting, the way the initial black hole mass spectrum would be distorted by both the bouncing effect and the Hawking evaporation.

Automated summary

Recent studies have intensively explored the possibility of Planck-mass black holes tunneling into metastable white holes after evaporation, which are considered as a candidate for dark matter. The model is severely constrained, with potential detection paths highlighted. Furthermore, the distortion of the initial black hole mass spectrum by bouncing effects and Hawking evaporation is investigated in a more general setting.