Dynamical mechanism of vacuum energy compensation

TL;DR

This paper proposes a model where a scalar field interaction with curvature scalar neutralizes vacuum energy, transforming exponential expansion into standard cosmological evolution dominated by relativistic matter.

Contribution

It introduces a new scalar field interaction model that converts vacuum energy-driven exponential expansion into typical cosmological evolution.

Findings

Exponential expansion is transformed into matter-dominated evolution.

The model effectively compensates vacuum energy effects.

Cosmological constant effects are neutralized in the model.

Abstract

The model of vacuum energy compensation due to interaction of a scalar field $\phi$ with curvature scalar of the form $\beta R \phi^2 f(\phi) $ is proposed. It is shown that with a simple power form of $f(\phi)$ the exponential expansion, induced by vacuum energy (or what is the same by cosmological constant), is transformed into canonical cosmological evolution of the universe dominated by relativistic matter.