2015/06/10 by Shin’ichi Nojiri, S. Nojiri, S. D. Odintsov +5
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #Constant (computer programming) #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark energy #Differential equation #Equation of state #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Geophysics and Gravity Measurements #Gravitational singularity #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Inflation (cosmology) #Mathematical analysis #Mathematical physics #Mathematics #Physics #Quantum mechanics #Regular singular point #Singular solution #Singularity #Solar and Space Plasma Dynamics #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.48550/arxiv.1506.03307
LaTeX 13 pages
arxiv created 2015/06/10 · openalex publication_date 2015/06/10 · arxiv updated 2015/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study models with a generalized inhomogeneous equation of state fluids, in the context of singular inflation, focusing to so-called Type IV singular evolution. In the simplest case, this cosmological fluid is described by an equation of state with constant w, and therefore a direct modification of this constant w fluid, is achieved by using a generalized form of an equation of state. We investigate from which models with generalized phenomenological equation of state, a Type IV singular inflation can be generated and what the phenomenological implications of this singularity would be. We support our results with illustrative examples and we also study the impact of the Type IV singularities on the slow-roll parameters and on the observational inflationary indices, showing the consistency with Planck mission results. The unification of singular inflation with singular dark energy era for specific generalized fluids is also proposed.