2011/10/31 by M. R. Setare, F. Darabi · 45 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Differential equation #Differential geometry #Friedmann equations #Noncommutative and Quantum Gravity Theories #Shape of the universe #Torsion (gastropod) #Universe #gr-qc #physics.gen-ph
paper · pdf · doi:10.1007/s10714-012-1408-6
published in General Relativity and Gravitation 44(10), 2521-2527 (Springer Science+Business Media) · 8 pages, minor revision
openalex publication_date 2012/06/30 · arxiv created 2012/09/20 · arxiv updated 2015/05/29 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We have considered an action of the form T+f(T)+Lm describing Einstein's gravity plus a function of the torsion scalar. By considering an exact power-law solution we have obtained the Friedmann equation as a differential equation for the function f(T) in spatially flat universe and obtained the real valued solutions of this equation for some power-law solutions. We have also studied the power-law solutions when the universe enters a Phantom phase and shown that such solutions may exist for some f(T) solutions.