Ultramassive Black Star Cosmology: Quantum Phase Transition and Singularity-Free Cosmic Bounce

Abstract

This preprint proposes an alternative model to the initial Big Bang singularity by postulating that the observable universe originated from the quantum bounce of an ultramassive object ("Black Star") containing the total mass-energy of the cosmos ($\approx 10^{53} \text{ kg}$). Using modified Friedmann equations incorporating Loop Quantum Cosmology (LQC) corrections, the study examines how reaching Planck density induces a repulsive gravitational phase transition rather than a physical collapse to a point of infinite density. It also explores cosmological implications, including infrared suppression in the primordial gravitational wave spectrum and parity asymmetry in CMB polarization as potential observational signatures.