An Inflationary Equation of State

TL;DR

This paper proposes an inflationary model based on a single-parameter equation of state that aligns with current observational constraints and can accommodate a wide range of tensor-to-scalar ratios, making it compatible with future measurements.

Contribution

It introduces a novel inflationary model using a single parameter equation of state that fits all recent observational constraints and spans a broad tensor-to-scalar ratio range.

Findings

Model covers tensor-to-scalar ratio from 10^{-1} to 10^{-6}

Consistent with latest inflationary observational data

Capable of matching future tensor-to-scalar ratio measurements

Abstract

We have studied inflationary paradigm through an inflationary equation of state. With a single parameter equation of state as a function of the scalar field responsible for accelerated expansion, we find an observationally viable model satisfying all the constraints as laid down by the recent observations. The resulting model can efficiently cover a wide range of tensor-to-scalar ratio ranging from $r\sim\mathcal{O}(10^{-1})$ to $\mathcal{O}(10^{-6})$, other inflationary observables being consistent with the latest data. Nowadays ultimate eliminator between inflationary models is the tensor-to-scalar ratio, the model presented here is capable of keeping up with the future probes of tensor-to-scalar ratio at the same time having good agreement with other inflationary observables.