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Braneworld cosmological perturbations

Published online by Cambridge University Press:  30 September 2008

A. Oscoz ,
E. Mediavilla ,
M. Serra-Ricart  and
S.S. Seahra
S.S. Seahra*
Affiliation:
Department of Mathematics & Statistics, University of New Brunswick, Fredericton, New Brunswick, Canada
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Abstract

A longstanding problem in braneworld cosmology is quantifying the dynamics of cosmological perturbations. This is because, unlike the 4-dimensional case, fluctuations are governed by non-separable partial differential equations (PDEs). We have developed a fast and accurate code to solve the relevant equations of motion, and hence extract observational predictions from braneworld models. Here, we briefly review braneworld scenarios, the perturbation problem, our numerical methods, and the results we have obtained for the Randall-Sundrum (RS) and Dvali-Gabadadze-Porrati (DGP) scenarios.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 30: Spanish Relativity Meeting - Encuentros Relativistas Españoles , ERE2007: Relativistic Astrophysics and Cosmology , 2008 , pp. 181 - 186
Copyright
© EAS, EDP Sciences, 2008

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References

Cardoso, A., Hiramatsu, T., Koyama, K., & Seahra, S.S., 2007a, Scalar perturbations in braneworld cosmology, JCAP, 07:008
Cardoso, A., Koyama, K., Seahra, S.S., & Silva, F.P., 2007b, Cosmological perturbations in the DGP braneworld: numeric solution
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Seahra, S.S., 2006, Gravitational waves and cosmological braneworlds: A characteristic evolution scheme, Phys. Rev. D, 74:044010