We review models which generate a large non‐Gaussianity of the local form. We first briefly
consider three models which generate the non‐Gaussianity either at or after the end of …

Primordial black holes (PBHs) provide an exciting prospect for accounting for dark matter. In
this paper, we consider inflationary models that incorporate realistic features from high …

We review analytical solutions of the Einstein equations which are expressed in terms of
elementary functions and describe Friedmann–Lemaître–Robertson–Walker universes …

Realistic models of high-energy physics include multiple scalar fields. Renormalization
requires that the fields have nonminimal couplings to the spacetime Ricci curvature scalar …

Modifications of the initial-state of the inflaton field can induce a departure from Gaussianity
and leave a testable imprint on the higher order correlations of the CMB and large scale …

This is the first of a three-part series of papers, in which we study the preheating phase for
multifield models of inflation involving nonminimal couplings. In this paper, we study the …

We compute the three-point correlation function of primordial scalar density perturbations in
a general single-field inflationary scenario, where a scalar field ϕ has a direct coupling with …

We study the level of primordial non-Gaussianity in slow-roll two-field inflation. Using an
analytic formula for the non-linear parameter f NL in the case of a sum or product separable …

We calculate the scale dependence of the bispectrum and trispectrum in (quasi) local
models of non-Gaussian primordial density perturbations, and characterize this scale …

We study a model of inflation with multiple pseudo-scalar fields coupled to a U (1) gauge
field through Chern–Simons interactions. Because of parity-violating interactions, one …