Cosmological perturbations in the DGP braneworld: Numeric solution

Journal Article · Tue Apr 15 00:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.083512· OSTI ID:21250007

Cardoso, Antonio; Koyama, Kazuya; Silva, Fabio P ^[1]; Seahra, Sanjeev S ^[1]

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1. Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 2EG (United Kingdom)

We solve for the behavior of cosmological perturbations in the Dvali-Gabadadze-Porrati (DGP) braneworld model using a new numerical method. Unlike some other approaches in the literature, our method uses no approximations other than linear theory and is valid on large scales. We examine the behavior of late-universe density perturbations for both the self-accelerating and normal branches of DGP cosmology. Our numerical results can form the basis of a detailed comparison between the DGP model and cosmological observations.

• OSTI ID: 21250007
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 8; Other Information: DOI: 10.1103/PhysRevD.77.083512; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
COMPARATIVE EVALUATIONS
COSMOLOGY
DENSITY
DISTURBANCES
MATHEMATICAL SOLUTIONS
NUMERICAL SOLUTION
PERTURBATION THEORY
SIMULATION
UNIVERSE