From recent observational data two significant directions have been made in the field of
theoretical cosmology recently. First, we are now able to make use of present observations …

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

A bstract We discuss N= 1 supergravity inflationary models based on two chiral multi-plets,
the inflaton and the goldstino superfield. Using superconformal methods for these models …

We confront various nonsingular bouncing cosmologies with the recently released BICEP2
data and investigate the observational constraints on their parameter space. In particular …

A bstract Large-field inflation is an interesting and predictive scenario. Its non-trivial
embedding in supergravity was intensively studied in the recent literature, whereas its …

Since the building-blocks of supersymmetric models include chiral superfields containing
pairs of effective scalar fields, a two-field approach is particularly appropriate for models of …

The magnitude of primordial tensor perturbations reported by the BICEP2 experiment is
consistent with simple models of chaotic inflation driven by a single scalar field with a power …

The simplest inflationary model V= 1 2 m 2 ϕ 2 represents the benchmark for future
constraints. For a quadratic potential, the quantity (ns-1)+ r/4+ 11 (ns-1) 2/24 vanishes (up to …

A bstract We propose a large class of supergravity models in terms of a single chiral matter
superfield, leading to (almost) arbitrary single-field inflationary scalar potentials similar to the …

Inflationary models, especially those with plateau-type potentials, are consistent with the
cosmological data, but inflation itself does not resolve the initial singularity. This singularity is …