Universe driven by the vacuum of scalar field: VFD model

TL;DR

The paper introduces the VFD model where vacuum fluctuations of scalar fields dominate the universe's expansion, leading to a universe with no decelerating phase and a monotonically evolving acceleration parameter, matching supernova data.

Contribution

It proposes a novel cosmological model where vacuum fluctuations drive acceleration without traditional matter or radiation domination epochs.

Findings

Acceleration parameter evolves monotonically from zero to negative values.

No decelerating past or standard radiation/matter domination epochs.

Model predictions align with SN Ia observational data.

Abstract

It is shown that in the Vacuum Fluctuations Domination model (VFD), where vacuum fluctuations of scalar fields dominates under matter and radiation throughout the all history of the Universe expansion (arXiv:gr-qc/0604020, arXiv:gr-qc/0610148), acceleration parameter evolves monotonically from the zero to the present day negative value. That is according to this model the Universe has no decelerating past and conventional radiation domination and matter domination epochs are absent. Predictions of accelerating parameter for z~0-2 is compared with that follows from the SN type Ia data.