2003/07/31 by Georgios Kofinas, G. Kofinas, Roy Maartens +3 · 2 citations
Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Brane #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Curvature #Dark energy #Geometry #Inflation (cosmology) #Inflaton #Mathematical physics #Metric expansion of space #Physical cosmology #Physics #Quantum mechanics #Randall–Sundrum model #Scalar curvature #Scale factor (cosmology) #Singularity #Theoretical physics #Ultimate fate of the universe #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1088/1126-6708/2003/10/066
published as JHEP0310:066,2003 · RevTex4, 8 pages, no figures, minor changes
arxiv created 2003/10/29 · openalex publication_date 2003/10/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the cosmology of the Randall-Sundrum brane-world where the Einstein-Hilbert action is modified by curvature correction terms: a four-dimensional scalar curvature from induced gravity on the brane, and a five-dimensional Gauss-Bonnet curvature term. The combined effect of these curvature corrections to the action removes the infinite-density big bang singularity, although the curvature can still diverge for some parameter values. A radiation brane undergoes accelerated expansion near the minimal scale factor, for a range of parameters. This acceleration is driven by the geometric effects, without an inflaton field or negative pressures. At late times, conventional cosmology is recovered.