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 …

With the establishment and maturation of the experimental programs searching for new
physics with sizeable couplings at the LHC, there is an increasing interest in the broader …

We present a renormalizable theory of scalars in which the low-energy effective theory
contains a pseudo-Goldstone boson with a compact field space of 2 π F and an approximate …

A bstract Flux couplings to string theory axions yield super-Planckian field ranges along
which the axion potential energy grows. At the same time, other aspects of the physics …

We derive constraints facing models of axion inflation based on decay constant alignment
from a string-theoretic and quantum gravitational perspective. In particular, we investigate …

A bstract We discuss quantum gravitational effects in Einstein theory coupled to periodic
axion scalars to analyze the viability of several proposals to achieve superplanckian axion …

Cosmic inflation provides an attractive framework for understanding the early Universe and
the cosmic microwave background. It can readily involve energies close to the scale at …

We present a new model of large field inflation along a winding trajectory in the field space
of two axionic fields, where the “axions” originate from the complex structure moduli sector of …

A bstract The QCD axion's coupling to photons is often assumed to lie in a narrow band as a
function of the axion mass. We demonstrate that several simple mechanisms, in addition to …

A bstract Primordial non-Gaussianity signatures of extremely heavy particles are re-
examined within a simple alternative to the standard inflationary paradigm, in which the …