49 citations · 49 across the 3 of their papers we have counts for
6 papers
Automorphic Structures of Heterotic Vacua
Jacob M. Leedom, Nicole Righi, Alexander Westphal
We study moduli stabilization in 4D effective field theories with Sp(4,) self-duality inspired by heterotic orbifold compactifications with Wilson lines. The target-spa…
Towards a Heterotic Axiverse
Jacob M. Leedom, Margherita Putti, Alexander Westphal
In this paper we initiate a broad study of some central properties of the string axiverse arising from Calabi-Yau compactifications of the perturbative heterotic th…
Uplifts in the Penumbra: Features of the Moduli Potential away from Infinite-Distance Boundaries
Stefano Lanza, Alexander Westphal
The construction of meta-stable four-dimensional de Sitter vacua in type IIB string compactifications represents an important question and an ongoing area of work. There is conside…
Preheating Axions in String Cosmology
Jacob M. Leedom, Margherita Putti, Nicole Righi +1
Certain inflationary models can feature periods of preheating - an era preceding reheating during which parametric resonance triggers an exponential production of bosons. This non-…
Gravitational Axiverse Spectroscopy: Seeing the Forest for the Axions
Ema Dimastrogiovanni, Matteo Fasiello, Jacob M. Leedom +2
We consider inflationary models with multiple spectator axions coupled to dark gauge sectors via Chern-Simons (CS) terms. The energy injection into Abelian gauge fields from the ax…
Eternal Inflation with alpha'-Corrections
Alexander Westphal
Higher-order alpha'-corrections are a generic feature of type IIB string compactifications. In KKLT-like models of moduli stabilization they provide a mechanism of breaking the no-…