Inflation after Curvature Bounce

TL;DR

This paper proposes a stable closed universe cosmological model driven by a scalar field, utilizing spatial curvature to avoid singularities and match observational data on inflationary parameters.

Contribution

It introduces a novel stable closed universe model with curvature-driven stability, reconstructs its Lagrangian, and demonstrates compatibility with current observational constraints.

Findings

Model achieves stability without exotic matter

Numerical predictions match observed spectral index and tensor-to-scalar ratio

Multiple parameter sets fit current cosmological data

Abstract

We present a stable cosmological model of a closed universe in the presence of conventional scalar field. The stability of the model and absence of singularity is ensured by spatial curvature without the need for additional peculiar matter. We reconstruct the Lagrangian and numerically compute observational predictions, including the number of e-folds, the spectral index $n_s$, and the tensor-to-scalar ratio. We present several sets of parameters that satisfy the current observational data.