Stochastic background of relic gravitons in a bouncing quantum cosmological model

TL;DR

This paper calculates the spectrum of relic gravitons in a quantum bouncing universe, finding the amplitude too small for detection, thus providing a way to test or rule out such models through future observations.

Contribution

It presents a detailed calculation of the relic graviton background in a quantum cosmological bouncing model, highlighting its observational unfeasibility.

Findings

Relic graviton amplitude is extremely small.

Detection of these gravitons would disprove the model.

The model includes dust and radiation fluids.

Abstract

The spectrum and amplitude of the stochastic background of relic gravitons produced in a bouncing universe is calculated. The matter content of the model consists of dust and radiation fluids, and the bounce occurs due to quantum cosmological effects when the universe approaches the classical singularity in the contracting phase. The resulting amplitude is very small and it cannot be observed by any present and near future gravitational wave detector. Hence, as in the ekpyrotic model, any observation of these relic gravitons will rule out this type of quantum cosmological bouncing model.