Cody Long

Planckian axions and the Weak Gravity Conjecture

A bstractSeveral recent works [1-3] have claimed that the Weak Gravity Conjecture (WGC) excludes super-Planckian displacements of axion fields, and hence large-field axion inflation, in the absence of monodromy. We argue that in theories with N ≫ 1 axions, super-Planckian axion diameters D

Planckian axions in string theory

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Systematics of axion inflation in Calabi-Yau hypersurfaces

are readily allowed by the WGC. We clarify the non-trivial relationship between the kinetic matrix K — unambiguously defined by its form in a Minkowski-reduced basis — and the diameter of the axion fundamental domain, emphasizing that in general the diameter is not solely determined by the eigenvalues f12 ≤ ⋅ ⋅ ⋅ ≤ fN2 of K: the orientations of the eigenvectors with respect to the identifications imposed by instantons must be incorporated. In particular, even if one were to impose the condition fN< Mpl, this would imply neither D

Algorithmic universality in F-theory compactifications

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Vacuum Selection from Cosmology on Networks of String Geometries

< Mpl nor D