2019/11/30 by C. D. Peralta, C.D. Peralta, S. E. Jorás +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmological constant #Cosmology and Gravitation Theories #Einstein #Entropic gravity #Frame (networking) #Inflation (cosmology) #Lagrangian #Metric (unit) #Relativity and Gravitational Theory #Simple (philosophy) #astro-ph.CO #f(R) gravity #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2020/06/053
13 pages, 11 figures. Matches version accepted for publication in JCAP
openalex created_date 2019/11/22 · arxiv created 2020/05/25 · openalex publication_date 2020/06/25 · arxiv updated 2020/07/01 · openalex updated_date 2026/08/06
This paper starts from a toy model for inflation in a class of modified theories of gravity in the metric formalism. Instead of the standard procedure—assuming a non-linear Lagrangian f ( R ) in the Jordan frame—we start from a simple ϕ 2 potential in the Einstein frame and investigate the corresponding f ( R ) in the former picture. The addition of an ad-hoc Cosmological Constant in the Einstein frame leads to a Thermodynamical interpretation of this physical system, which allows further insight on its (meta)stability and evolution.