Probability of warm inflation in loop quantum cosmology
| Autor: | Leila L. Graef, Rudnei O. Ramos |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
High Energy Physics - Theory
A priori probability Cosmology and Nongalactic Astrophysics (astro-ph.CO) Cosmic microwave background FOS: Physical sciences Context (language use) General Relativity and Quantum Cosmology (gr-qc) Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences General Relativity and Quantum Cosmology symbols.namesake High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Statistical physics Planck 010306 general physics Loop quantum cosmology Physics Inflation (cosmology) 010308 nuclear & particles physics Inflaton High Energy Physics - Phenomenology High Energy Physics - Theory (hep-th) Warm inflation symbols Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Physical Review D. 98 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.98.023531 |
| Popis: | Warm inflation is analyzed in the context of loop quantum cosmology (LQC). The bounce in LQC provides a mean through which a Liouville measure can be defined, which has been used previously to characterize the a priori probability for inflation in LQC. Here we take advantage of the tools provided by LQC to study instead the a priori probability for warm inflation dynamics in the context of a monomial quartic inflaton potential. We study not only the question of how a general warm inflation dynamics can be realized in LQC with an appropriate number of e-folds, but also how such dynamics is constrained to be in agreement with the latest cosmic microwave background radiation data from Planck. The fraction of warm inflation trajectories in LQC that gives both the required minimum amount e-folds of expansion and also passes through the observational window of allowed values for the tensor-to-scalar ratio and the spectral tilt is explicitly obtained. We find that the probability of warm inflation with a monomial quartic potential in LQC is higher than that of cold inflation in the same context. Furthermore, we also obtain that the a priori probability gets higher as the inherent dissipation of the warm inflation dynamics increases. |
| Databáze: | OpenAIRE |
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