Energy Conservation in Flat FRW Cosmology

TL;DR

This paper explores how energy conservation influences the accelerating expansion of flat FRW cosmology, proposing a mechanism involving gravitational potential and metric expansion, with implications for early universe modeling.

Contribution

It introduces a novel mechanism linking energy conservation to cosmic acceleration via gravitational potential effects and metric expansion in flat FRW cosmology.

Findings

Energy conservation leads to positive acceleration in flat FRW models.

A semi-classical quintic equation describes the scale parameter evolution.

Implications for primordial universe expansion are discussed.

Abstract

The consequence of energy conservation in the flat Friedmannn-Robertson-Walker (FRW) cosmology is a strictly positive accelerating expansion. A mechanism is proposed for this expansion due to the effect of the attractive (negative) gravitational potential of matter as it is being included within the expanding horizon, and the offsetting work of metric expansion, which takes place at sub-luminal speed. In our semi-classical treatment, we deal with a quintic as the equation for the scale parameter. Implications for modeling the earliest parts of the primordial expansion are discussed.