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 inflationary origin of primordial black holes (PBHs) relies on a large enhancement of the
power spectrum Δ ζ of the curvature fluctuation ζ at wavelengths much shorter than those of …

All single-field inflationary models invoke varying degrees of tuning in order to account for
cosmological observations. Mechanisms that generate primordial black holes (PBHs) from …

We present a non-perturbative method for calculating the abundance of primordial black
holes given an arbitrary one-point probability distribution function for the primordial …

A bstract We show that a scalar excited state with large occupation numbers during inflation
leads to an enhancement of tensor modes and a characteristic pattern of order-one …

Fluctuations play a critical role in cosmology. They are relevant across a range of
phenomena from the dynamics of inflation to the formation of structure. In many cases, these …

A bstract It is becoming increasingly clear that large but rare fluctuations of the primordial
curvature field, controlled by the tail of its probability distribution, could have dramatic effects …

We study signatures of primordial non-Gaussianity (PNG) in the redshift-space halo field on
nonlinear scales using a combination of three summary statistics, namely, the halo mass …

Scalar fields interacting with the primordial curvature perturbation during inflation may
communicate their statistics to the latter. This situation motivates the study of how the …

The late-time effect of primordial non-Gaussianity offers a window into the physics of inflation
and the very early Universe. In this work, we study the consequences of a particular class of …