Observable tensor-to-scalar ratio and secondary gravitational wave background

TL;DR

This paper demonstrates that a simple vacuum energy dominated inflection-point inflation model can produce a detectable tensor-to-scalar ratio and secondary gravitational wave background, aligning with current CMB data and promising future observability.

Contribution

It introduces a minimal inflationary model that predicts observable gravitational wave signals and a large tensor-to-scalar ratio consistent with current data.

Findings

Predicts tensor-to-scalar ratio r ~ 10^{-3} to 10^{-2}

Forecasts detectable secondary gravitational waves for future experiments

Aligns inflationary predictions with current CMB observations

Abstract

In this paper we will highlight how a simple vacuum energy dominated inflection-point inflation can match the current data from cosmic microwave background radiation, and predict large primordial tensor to scalar ratio, $r \sim \mathcal{O}(10^{-3}-10^{-2})$, with observable second order gravitational wave background, which can be potentially detectable from future experiments, such as DECi-hertz Interferometer Gravitational wave Observatory (DECIGO), Laser Interferometer Space Antenna (eLISA), Cosmic Explorer (CE), and Big Bang Observatory (BBO).