An extension of the cosmological standard model with a bounded Hubble expansion rate

TL;DR

This paper explores an extended cosmological model where the Hubble expansion rate is limited to a finite range, leading to two accelerated expansion phases, and tests it against observational data and theoretical frameworks.

Contribution

It introduces a novel extension of the standard cosmological model with bounded Hubble rate, resulting in two natural accelerated expansion periods.

Findings

Two accelerated expansion phases naturally emerge.

Model fits well with cosmological data.

Provides a new perspective beyond the standard model.

Abstract

The possibility of having an extension of the cosmological standard model with a Hubble expansion rate $H$ constrained to a finite interval is considered. Two periods of accelerated expansion arise naturally when the Hubble expansion rate approaches to the two limiting values. The new description of the history of the universe is confronted with cosmological data and with several theoretical ideas going beyond the standard cosmological model.