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 …

We present a pedagogical overview of flux compactifications in string theory, from the basic
ideas to the most recent developments. We concentrate on closed-string fluxes in type-II …

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

A bstract We observe a direct relation between the existence of fundamental axionic strings,
dubbed EFT strings, and infinite distance limits in 4d\(\mathcal {N}\)= 1 EFTs coupled to …

A bstract We construct supersymmetric AdS 4 vacua of type IIB string theory in
compactifications on orientifolds of Calabi-Yau threefold hypersurfaces. We first find explicit …

A bstract We show that the strong CP problem is solved in a large class of compactifications
of string theory. The Peccei-Quinn mechanism solves the strong CP problem if the CP …

Wrapped branes in string compactifications introduce a monodromy that extends the field
range of individual closed-string axions to beyond the Planck scale. Furthermore …

A bstract We examine the mechanism of moduli stabilization by fluxes in the limit of a large
number of moduli. We conjecture that one cannot stabilize all complex-structure moduli in F …

This review article provides a pedagogical introduction into various classes of chiral string
compactifications to four dimensions with D-branes and fluxes. The main concern is to …

We describe a method for finding flux vacua of type IIB string theory in which the Gukov-Vafa-
Witten superpotential is exponentially small. We present an example with W 0≈ 2× 10-8 on …