Aligned natural inflation with modulations
Kiwoon Choi, Hyungjin Kim
TL;DR
This paper investigates how modulations in the inflaton potential, suggested by the weak gravity conjecture, induce oscillations in the primordial power spectrum and explores their observational constraints.
Contribution
It introduces a model of aligned natural inflation with potential modulations and analyzes the resulting primordial power spectrum oscillations.
Findings
Oscillations in the power spectrum are induced by potential modulations.
Observational data constrains the amplitude and frequency of these oscillations.
The modulation period is linked to sub-Planckian axion scales.
Abstract
The weak gravity conjecture applied for the aligned natural inflation indicates that generically there can be a modulation of the inflaton potential, with a period determined by sub-Planckian axion scale. We study the oscillations in the primordial power spectrum induced by such modulation, and discuss the resulting observational constraints on the model.
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