Primordial Black Hole Reheating

Understand

Post-inflationary reheating phase is usually said to be solely governed by the decay of coherently oscillating inflaton into radiation.

• In this submission, we explore a new avenue toward reheating through the evaporation of primordial black holes (PBHs).
• After the inflation, if PBHs form, depending on its initial mass, abundance, and inflaton coupling with the radiation, we found two physically distinct possibilities of reheating the universe.
• In one possibility, the thermal bath is solely obtained from the decay of PBHs while inflaton plays the role of dominant energy component in the entire process.