Superluminary Universe: A Possible Solution to the Initial Value Problem in Cosmology

TL;DR

This paper proposes a cosmological model where early Universe Lorentz invariance breaking causes superluminal light speeds, solving horizon, monopole, and flatness problems, and predicts scale-invariant quantum fluctuations.

Contribution

It introduces a novel early Universe phase transition that temporarily increases light speed, addressing key cosmological issues and providing a new mechanism for quantum fluctuation generation.

Findings

Solves horizon problem via superluminal communication

Suppresses monopoles through phase transition

Predicts scale-invariant quantum fluctuations

Abstract

The spontaneous breaking of local Lorentz invariance in the early Universe, associated with a first order phase transition at a critical time $t_c$, generates a large increase in the speed of light and a superluminary communication of information occurs, allowing all regions in the Universe to be causally connected. This solves the horizon problem, leads to a mechanism of monopole suppression in cosmology and can resolve the flatness problem. After the critical time $t_c$, local Lorentz (and diffeomorphism) invariance is restored and light travels at its presently measured speed. The kinematical and dynamical aspects of the generation of quantum fluctuations in the superluminary Universe are investigated. A scale invariant prediction for the fluctuation density amplitude is obtained.