2019/01/21 by Debaprasad Maity, Pankaj Saha
Physics and Astronomy · #Attractor #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Equation of state #Eternal inflation #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Inflaton #Mathematical analysis #Mathematical physics #Parameter space #Phase space #Physics #Planck #Quantum mechanics #Statistical physics #Supergravity #Supersymmetry #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/1361-6382/ab0038
published as Class. Quantum Grav. 36 045010 (2019) · 27 pages, 8 figures. Matches Published version. (This work supersedes the work: arXiv:1610.00173 [astro-ph.CO])
openalex publication_date 2019/01/21 · arxiv created 2019/02/05 · arxiv updated 2019/03/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract With the growing consensus on simple power law inflation models not being favored by the PLANCK observations, dynamics for the non-standard inflation gain significant interest in the recent past. In this paper, we analyze in detail a class of supergravity inspired phenomenological inflationary models with non-polynomial potential based on Maity (2017 Nucl. Phys . B 919 560), and compare the model predictions with the currently most favored Starobinsky and its generalized -attractor models in the plane constrained by PLANCK. Importantly for a wide range of parameter space, our model provides successful inflation in the sub-Planckian regime. We also have performed model independent analysis of reheating in terms of the effective equation of state parameter. In particular, we consider two stages of reheating dynamics with generalized inflaton equation of state in the initial and relativistic equation of state in the later phase. Finally, we show how our generalized reheating analysis constrains the inflation models under consideration.