Inflaton perturbations in brane-world cosmology with induced gravity

Shuntaro Mizuno, Kazuya Koyama

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

We study cosmological perturbations in the brane models with an induced Einstein- Hilbert term on a brane. We consider an inflaton confined to a de Sitter brane in a five-dimensional Minkowski spacetime. There are two branches (± branches) of solutions for the background spacetime. In the + branch, which includes the selfaccelerating universe, a resonance appears. In the - branch, which can be thought as the Randall-Sundrum type brane-world with the high energy quantum corrections, there is no resonance. At high energies, we analytically confirm that four-dimensional Einstein gravity is recovered, which is related to the disappearance of van Dam- Veltman-Zakharov discontinuity in de Sitter spacetime. On sufficiently small scales, we confirm that the lineariaed gravity on the brane is well described by the Brans- Dicke theory with ω = 3Hrc in - branch and ω = -3Hrc in + branch, respectively, which confirms the existence of the ghost in + branch.

Original languageEnglish
Title of host publicationProceedings of the 16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006
Pages188-191
Number of pages4
Publication statusPublished - 2006
Externally publishedYes
Event16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006 - Niigata
Duration: 2006 Nov 272006 Dec 1

Other

Other16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006
CityNiigata
Period06/11/2706/12/1

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Mizuno, S., & Koyama, K. (2006). Inflaton perturbations in brane-world cosmology with induced gravity. In Proceedings of the 16th Workshop on General Relativity and Gravitation in Japan, JGRG 2006 (pp. 188-191)