Chaplygin inflation in loop quantum cosmology

TL;DR

This paper explores a Chaplygin gas-based inflationary model within loop quantum cosmology, deriving primordial perturbations and matching observational data, thus providing a novel approach to early universe cosmology.

Contribution

It introduces a new inflationary scenario combining Chaplygin gas and loop quantum effects, with detailed calculations of perturbations and observational consistency.

Findings

Model aligns with WMAP 5-year data

Derived scalar spectral index and tensor-to-scalar ratio

Provided parameter constraints for Chaplygin inflation

Abstract

In this paper we discuss the inflationary universe in the context of a Chaplygin gas equation of state within the framework of the effective theory of loop quantum cosmology. Under the slow-roll approximation, we calculate the primordial perturbations for this model. We give the general expressions of the scalar spectral index, its running, and the tensor-to-scalar ratio, etc. For the chaotic inflation with a quadratic potential, using the WMAP 5-year results, we determine the parameters of the Chaplygin inflation model in loop quantum cosmology. The results are consistent with the WMAP observations.