The spontaneous breaking of local Lorentz invariance in the early Universe, associated with a first order phase transition at a critical time tc, 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 tc, 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.
International Journal of Modern Physics D
- Pub Date:
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- Updated version (with the exception of two figures not included) of paper published in: International Journal of Modern Physics D, Vol. 2, No. 3 (1993) 351-365