Accelerated expansion of the universe purely driven by scalar field fluctuations

TL;DR

This paper proposes that scalar field fluctuations in a closed universe can independently cause cosmic acceleration, offering a new perspective on inflation and dark energy phenomena.

Contribution

It introduces a novel mechanism where scalar field fluctuations drive acceleration in a closed universe, distinct from traditional dark energy models.

Findings

Scalar fluctuations can induce acceleration in a closed universe.

The mechanism requires the Compton wavelength to exceed the universe's radius.

Potential implications for inflation and dark energy models.

Abstract

We show that scalar field fluctuations alone can drive cosmic acceleration, provided the universe is spatially closed and the Compton wavelength of the field exceeds the radius of curvature. This mechanism may open new perspectives on inflation and dark energy, which could arise from a gas of sufficiently light bosons in a closed universe.