Back to Search
Start Over
Cosmology from pregeometry
- Publication Year :
- 2021
- Publisher :
- arXiv, 2021.
-
Abstract
- We discuss cosmological solutions for a diffeomorphism invariant gauge theory of the non-compact Lorentz group $SO(1,3)$. Besides the gauge bosons our model of pregeometry contains a vector field in the vector representation of $SO(1,3)$ and a scalar singlet. General relativity and variable gravity emerge as effective theories for large distances and times in Planck units. We propose an approximation to the effective action with up to two derivatives. For a suitable range of parameters the universe approaches for large times stable Minkowski space. For late cosmology the model predicts dynamical dark energy and provides for a candidate for dark matter. Early cosmology is characterized by an inflationary epoch. The beginning of the universe in the infinite past is great emptiness, corresponding to an ultraviolet fixed point with the associated quantum scale symmetry. The beginning universe is a vacuum state with vanishing expectation values and finite non-vanishing correlation functions for the fluctuations of all fields. There is no physical big bang singularity.<br />Comment: Further explanations, new references, 63 pages, 9 figures
- Subjects :
- Physics
High Energy Physics - Theory
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Initial singularity
media_common.quotation_subject
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
General Relativity and Quantum Cosmology (gr-qc)
Universe
Cosmology
General Relativity and Quantum Cosmology
Theoretical physics
Pregeometry (physics)
High Energy Physics - Theory (hep-th)
Dark energy
Inflationary epoch
Gauge theory
Planck units
media_common
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....961feb61dd1e3513aafa2225d1049381
- Full Text :
- https://doi.org/10.48550/arxiv.2104.14013