From inflation to late time acceleration with a decaying vacuum coupled to radiation or matter
| Autor: | Stéphane Fay |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Inflation (cosmology) Nuclear and High Energy Physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) General relativity media_common.quotation_subject FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Universe General Relativity and Quantum Cosmology Thermodynamics of the universe Classical mechanics Singularity Quantum electrodynamics Dark energy Negative energy Scale factor (cosmology) media_common Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | We consider General Relativity with matter and radiation, one of these fluids being coupled to vacuum. We find that Universe dynamics starts by an inflation phase if the coupled fluid has a negative energy density at early time. Then, there is always a finite scale factor singularity but when vacuum and matter are coupled and matter density behaves like a negative radiation density. Moreover, the convergence to the LCDM model is clearly easier to reach when vacuum is coupled to matter rather than to radiation. Two classes of theories are studied to illustrate these results. 9 pages, 7 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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