2013/08/31 by Adel Awad, Ahmed Farag Ali, Barun Majumder · 131 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Friedmann–Lemaître–Robertson–Walker metric #Invertible matrix #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #Quantum mechanics #Rainbow #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2013/10/052
published in Journal of Cosmology and Astroparticle Physics 2013(10), 052 (Institute of Physics) · Highlighted in Nature Middle East (http://www.nature.com/nmiddleeast/2013/130815/full/nmiddleeast.2013.211.html)
openalex publication_date 2013/10/28 · arxiv created 2013/11/14 · arxiv updated 2013/11/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In this work, we study FRW cosmologies in the context of gravity rainbow. We discuss the general conditions for having a nonsingular FRW cosmology in gravity rainbow. We propose that gravity rainbow functions can be fixed using two known modified dispersion relation (MDR), which have been proposed in literature. The first MDR was introduced by Amelino-Camelia, et el. in [9] and the second was introduced by Magueijo and Smolin in [24]. Studying these FRW-like cosmologies, after fixing the gravity rainbow functions, leads to nonsingular solutions which can be expressed in exact forms.