In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

We revisit the one-loop correction in curvature perturbation power spectrum in models of
single field inflation which undergo a phase of ultra slow-roll (USR) inflation. We include the …

Using the δN formalism we calculate the one-loop correction to the large-scale power
spectrum of the curvature perturbation in the standard scenario where primordial black holes …

Cosmic inflation provides a window to the highest energy densities accessible in nature, far
beyond those achievable in any realistic terrestrial experiment. Theoretical insights into the …

The most widely studied formation mechanism of a primordial black hole (PBH) is collapse
of large-amplitude perturbation on small scales generated in single-field inflation. In this …

The stochastic gravitational wave background (SGWB) detected recently by the pulsar timing
arrays (PTAs) observations may have cosmological origins. In this work we consider a …

Primordial non-Gaussianities from multi-field inflation are a leading target for cosmological
observations, because of the possible large correlations generated between long and short …

For primordial perturbations, deviations from Gaussian statistics on the tail of the probability
distribution can be associated with non-perturbative effects of inflation. In this paper, we …

Primordial black holes (PBHs) can be formed from the collapse of large-amplitude
perturbation on small scales in the early universe. Such an enhanced spectrum can be …

Primordial black holes (PBHs) cannot be produced abundantly enough to be the dark matter
in canonical single-field inflation under slow roll. This conclusion is robust to local non …