Slow-roll parameters in braneworld cosmologies

2004/02/29 by Gianluca Calcagni · 1 citation
Mathematics · Physics and Astronomy · #Attractor #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Formalism (music) #Friedmann equations #Galaxies: Formation, Evolution, Phenomena #Geometry #Hubble's law #Inflation (cosmology) #Inflaton #Mathematical analysis #Mathematical physics #Mathematics #Physics #Quantum mechanics #Scalar (mathematics) #Slow roll #Tachyon #Theoretical physics #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.69.103508

published as Phys.Rev. D69 (2004) 103508 · 28 pages REVTeX4, 4 figures; v2: new figures and comments, references added, the content of Appendix A has been moved into the main text. Accepted by Physical Review D

arxiv created 2004/04/22 · openalex publication_date 2004/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present a general slow-roll formalism within braneworld-motivated cosmologies with non-standard effective Friedmann equations. Full towers of parameters involving either the inflaton potential or the Hubble parameter are constructed and the dynamics of nontachyonic and tachyonic fields are considered in detail; exact cosmological solutions and the inflationary attractor condition are provided. We compare scalar-driven and tachyon-driven accelerating eras through slow-roll correspondence and the observational imprint on early-universe structures.

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• High-energy theory for close Randall-Sundrum branes