The past two decades have seen transformative advances in cosmology and string theory.
Observations of the cosmic microwave background have revealed strong evidence for …

De Sitter solutions have been recently conjectured to be incompatible with quantum gravity.
In this paper we critically assess the progress and challenges of different mechanisms to …

We investigate the power spectrum of Non-Cold Dark Matter (NCDM) produced in a state out
of thermal equilibrium. We consider dark matter production from the decay of scalar …

In recent years it has been realized that in string/M theories compactified to four dimensions
which satisfy cosmological constraints, it is possible to make some generic predictions for …

We subject the phenomenologically successful large volume scenario of hep-th/0502058 to
a first consistency check in string theory. In particular, we consider whether the expansion of …

A bstract We argue that dark radiation is naturally generated from the decay of the overall
volume modulus in the LARGE volume scenario. We consider both sequestered and non …

We present a new way to construct de Sitter vacua in type IIB flux compactifications, in which
the interplay of the leading perturbative and non-perturbative effects stabilize all moduli in …

We perform a general analysis on the possibility of obtaining metastable vacua with
spontaneously broken Script N= 1 supersymmetry and non-negative cosmological constant …

We revisit the recently proposed multi-natural inflation and its realization in supergravity in
light of the BICEP2 results. Multi-natural inflation is a single-field inflation model where the …

Recently it was found that a broad class of existing inflationary models based on
supergravity can be significantly simplified if some of the standard, unconstrained chiral …