In the recent years, primordial black holes (PBHs) have emerged as one of the most
interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could …

All cosmological observations to date are consistent with adiabatic, Gaussian and nearly
scale invariant initial conditions. These findings provide strong evidence for a particular …

Several unexpected features have been observed in the microwave sky at large angular
scales, both by WMAP and by Planck. Among those features is a lack of both variance and …

The current flow of high accuracy astrophysical data, among which are the Cosmic
Microwave Background (CMB) measurements by the Planck satellite, offers an …

The primordial scalar power spectrum is well constrained by the cosmological data on large
scales, primarily from the observations of the anisotropies in the cosmic microwave …

Cosmological α-attractors stand out as particularly compelling models to describe inflation in
the very early universe, naturally meeting tight observational bounds from cosmic microwave …

Combining the stochastic and δ N δ N formalisms, we derive non-perturbative analytical
expressions for all correlation functions of scalar perturbations in single-field, slow-roll …

We investigate the quantumness of primordial cosmological fluctuations and its detectability.
The quantum discord of inflationary perturbations is calculated for an arbitrary splitting of the …

In order to produce primordial black holes, or to enhance the spectrum of primordial
gravitational waves at interferometer scales, cosmological inflation should include brief …

For a Gaussian spectrum of primordial density fluctuations, ultracompact minihalos (UCMHs)
of dark matter are expected to be produced in much greater abundance than, eg, primordial …