Is the formation of primordial black holes from single-field inflation compatible with standard cosmology?
Phys. Rev. D 111, 123557 – Published 27 June, 2025
DOI: https://doi.org/10.1103/9rr3-ltbt
Abstract
In this work, we investigate the generation of primordial black holes (PBHs) within the framework of single-field inflationary models and their compatibility with the cosmological history of the Universe. Our results suggest that, depending on the masses of the formed PBHs, single-field inflation models require more than fine-tuning a potential to induce ultraslow roll; it necessitates a comprehensive understanding of the postinflationary cosmological evolution. As an explicative example, we introduce a new model, based on a double inflection point and consistent with cosmic microwave background observations, capable of generating subsolar PBHs, whose merger could be potentially detectable by the LVK experiment.
