From inflation to late acceleration: A new cosmological paradigm

TL;DR

This paper proposes a novel cosmological model where a derived cosmological term explains the universe's expansion history, including inflation, deceleration, and late acceleration, aligning with observational data.

Contribution

It introduces a new theoretical approach to derive the cosmological term, unifying different expansion phases of the universe within a single framework.

Findings

The model reproduces the universe's expansion from inflation to late acceleration.

It captures all characteristic phases of cosmic evolution.

Discussion includes observational implications of the new paradigm.

Abstract

A new idea of deriving a cosmological term from an underlying theory has been proposed in order to explain the expansion history of the universe. We obtain the scale factor with this derived cosmological term and demonstrate that it reflects all the characteristics of the expanding universe in different era so as to result in a transition from inflation to late acceleration through intermediate decelerating phases by this single entity. We further discuss certain observational aspects of this paradigm.