On Primordial Perturbations of Test Scalar Fields

TL;DR

This paper investigates how primordial perturbations of test scalar fields in various accelerated backgrounds could influence structure formation by transferring their fluctuations to curvature perturbations.

Contribution

It analyzes primordial perturbations of test scalar fields across different accelerated expansion scenarios, highlighting their potential role in cosmic structure formation.

Findings

Perturbations can be transferred to curvature perturbations under certain conditions.

Different (super)accelerated backgrounds affect the behavior of scalar field perturbations.

Potential mechanisms for structure formation via test scalar fields are discussed.

Abstract

The primordial perturbations of test scalar fields not affecting the evolution of background may be very interesting since they can be transferred to the curvature perturbations by some mechanisms, and thus under certain condition can be responsible for the structure formation of observable universe. In this brief report we study the primordial perturbations of test scalar fields in various (super)accelerated expanding backgrounds.