Primordial black holes ensued from exponential potential and coupling parameter in nonminimal derivative inflation model

Understand

Here, Primordial Black Holes (PBHs) creation from exponential potential has been inquired, through gravitationally raised friction emanated from the nonminimal coupling between gravity and field derivative setup.

• Setting a two-parted exponential function of inflaton field as coupling parameter, and fine-tuning of four parameter cases of our model, we could sufficiently slow down the inflaton owing to high friction during an ultra slow-roll phase.
• This empowers us to achieve enough enhancement in the amplitude of curvature perturbations power spectra, via numerical solving of Mukhanov-Sasaki equation.
• Thereafter, we illustrate the generation of four PBHs with disparate masses in RD era, corresponding to our four parameter cases.