Abstract
Black holes formed in the early universe are the most compelling candidates for dark matter and provide a unique probe for studying the inflationary era. Their formation is seeded by quantum fluctuations generated during cosmic inflation. The standard formation mechanism contains a semiclassical inconsistency as the gravitational collapse of those fluctuations that produce black holes is treated as a classical process. In this talk, I present a framework that closes this gap. Using the Horizon Quantum Mechanics (HQM) formalism, I derive the analytical expression that a given inflationary fluctuation collapses into a primordial black hole. The result reproduces exactly the classical estimate of PBH abundance and demonstrates that quantum correction enhances the formation probability.