Cosmology with Bounce by Flat Space-Time Theory of Gravitation and a New Interpretation

TL;DR

This paper proposes a flat space-time gravitational theory that predicts a bouncing universe avoiding singularities, aligns with general relativity at later times, and offers a new interpretation of a non-expanding universe.

Contribution

It introduces a classical flat space-time gravitational model that avoids singularities and provides a novel interpretation of cosmological evolution.

Findings

Universe contracts to a positive minimum and then expands.

Total energy of the universe is conserved.

Model aligns with general relativity at later times.

Abstract

General relativity predicts a singularity in the beginning of the universe being called big bang. Recent developments in loop quantum cosmology avoid the singularity and the big bang is replaced by a big bounce. A classical theory of gravitation in flat space-time also avoids the singularity under natural conditions on the density parameters. The universe contracts to a positive minimum and then it expands during all times. It is not symmetric with regard to its minimum implying a finite age measured with proper time of the universe. The space of the universe is flat and the total energy is conserved. Under the assumption that the sum of the density parameters is a little bit bigger than one the universe is very hot in early times. Later on, the cosmological model agrees with the one of general relativity. A new interpretation of a non-expanding universe may be given by virtue of flat space-time theory of gravitation.