Inflationary Potential from 21 cm Tomography and Planck

TL;DR

This paper explores how combining 21 cm tomography with Planck data enhances the reconstruction of the inflationary potential, improving constraints on inflation models and their parameters.

Contribution

It demonstrates that 21 cm measurements, when combined with Planck data, significantly improve the accuracy of inflationary potential reconstruction within the slow-roll framework.

Findings

21 cm data improves constraints on slow-roll parameters

Enhanced ability to determine inflationary potential shape

Better classification of inflation models based on tensor amplitude

Abstract

Three-dimensional neutral hydrogen mapping using the redshifted 21 cm line has recently emerged as a promising cosmological probe. Within the framework of slow-roll reconstruction, we analyze how well the inflationary potential can be reconstructed by combining data from 21 cm experiments and cosmic microwave background data from the Planck satellite. We consider inflationary models classified according to the amplitude of their tensor component, and show that 21 cm measurements can significantly improve constraints on the slow-roll parameters and determine the shape of the inflationary potential.