Evolution of gravitational waves in Randall-Sundrum cosmology

R. Easther, D. Langlois, Roy Maartens, David Wands

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We investigate the evolution of gravitational wave perturbations about a brane cosmology embedded in a five-dimensional anti-de Sitter bulk. During slow-roll inflation in a Randall-Sundrum brane-world, the zero mode of the five-dimensional graviton is generated, while the massive modes remain in their vacuum state. When the zero mode re-enters the Hubble radius during radiation domination, massive modes are generated. We show that modes decouple in the low-energy/near-brane limit and develop perturbative techniques to calculate the mode-mixing at finite energy.

Original languageEnglish
Pages (from-to)259-271
JournalJournal of Cosmology and Astroparticle Physics
Issue number10
Publication statusPublished - Oct 2003


  • Cosmological perturbation theory
  • Cosmology with extra dimensions
  • Gravity waves


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