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 …

We present a brief overview of attempts to construct de Sitter vacua in string theory and
explain how the results of this 20-year endeavor could point to the fact that string theory …

A new swampland criterion has recently been proposed. As a consequence, it forbids the
existence of de Sitter solutions in a low energy effective theory of a quantum gravity …

Double field theory (DFT) is a proposal to incorporate T-duality, a distinctive symmetry of
string theory, as a symmetry of a field theory defined on a double configuration space. The …

A bstract In M-theory, the only AdS 7 supersymmetric solutions are AdS 7× S 4 and its
orbifolds. In this paper, we find and classify new supersymmetric solutions of the type AdS …

We review recent developments in duality symmetric string theory. We begin with the world-
sheet doubled formalism which describes strings in an extended spacetime with extra …

A bstract AdS flux vacua with a parametric separation between the AdS and KK scales have
been conjectured to be in the Swampland. We study flux compactifications of massive IIA …

We revisit various aspects of AdS 4 flux vacua with scale separation in type II supergravity
and M-theory. We show that massless IIA allows both weakly and strongly coupled solutions …