We review applications of string theory to cosmology, from primordial times to the present-
day accelerated expansion. Starting with a brief overview of cosmology and string …

The Swampland program aims to distinguish effective theories which can be completed into
quantum gravity in the ultraviolet from those which cannot. This article forms an introduction …

These lecture notes provide a pedagogical introduction, with exercises, to the techniques
used in attempts to construct vacua with stabilized moduli in string theory. The reader is only …

A century ago, Einstein formulated his elegant and elaborate theory of General Relativity,
which has so far withstood a multitude of empirical tests with remarkable success …

Inspired by the recent conjecture originated from graduated dark energy that the Universe
has recently transitioned from anti–de Sitter vacua to de Sitter vacua, we extend the …

We give an overview of moduli stabilization in compactifications of string theory. We
summarize current methods for construction and analysis of vacua with stabilized moduli …

We consider single-field inflation in light of string-motivated'swampland'conjectures
suggesting that effective scalar field theories with a consistent UV completion must have …

Local determinations of the Hubble constant H 0 favor a higher value than Planck based on
cosmic microwave background and Λ cold dark matter (Λ CDM). Through a model …

A bstract We study the vacua of 4d heterotic toroidal orbifolds using effective theories
consisting of an overall Kähler modulus, the dilaton, and non-perturbative corrections to both …

In the simplest picture, the masses of string axions populating the axiverse depend on two
parameters: the supersymmetry-breaking scale M susy and the action S of the string …