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 …

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 Axions play a central role in inflationary model building and other cosmological
applications. This is mainly due to their flat potential, which is protected by a global shift …

We explore inflationary cosmology in a theory where there are two scalar fields which non-
minimally couple to the Ricci scalar and an additional R^ 2 R 2 term, which breaks the …

A bstract We argue that super-Planckian diameters of axion fundamental domains can arise
in Calabi-Yau compactifications of string theory. In a theory with N axions θ i, the …

Abstract In Aligned Natural Inflation, an alignment between different potential terms
produces an inflaton excursion greater than the axion scales in the potential. We show that …

A bstract We initiate a comprehensive survey of axion inflation in compactifications of type
IIB string theory on Calabi-Yau hypersurfaces in toric varieties. For every threefold with h 1 …

We suggest the new feature of primordial gravitational waves sourced by the axion-gauge
couplings, whose forms are motivated by the dimensional reduction of the form field in the …

A bstract We describe a novel technique that renders theories of N axions tractable, and
more generally can be used to efficiently analyze a large class of periodic potentials of …

A bstract We propose a mechanism for the natural inflation with and without modulation in
the framework of type IIB string theory on toroidal orientifold or orbifold. We explicitly …