# Low-frequency Gravitational Waves from Double-inflection-point Inflation

## TL;DR

This paper explores how double-inflection-point inflation can produce detectable low-frequency gravitational waves, linking early universe scalar perturbations with future observational prospects.

## Contribution

It introduces a model of inflation with two inflection points that explains both large-scale CMB data and small-scale scalar perturbation peaks, predicting observable gravitational waves.

## Key findings

- Low-frequency gravitational waves are potentially detectable by future space-based interferometers.
- The model aligns with CMB observations at large scales and predicts a significant scalar perturbation peak at small scales.
- Detectable gravitational wave signals are linked to specific inflationary features.

## Abstract

We study the production of gravitational waves from primordial scalar perturbations in double-inflection-point inflation, in which one of the inflection points predicts the power spectra consistent with CMB observations at large scales and the other generates a large peak in the power spectrum of scalar perturbations at small scales. We find that the reduced gravitational waves at low frequencies can be detected by future space-based laser interferometers.