Multiple-scales analysis of cosmological perturbations in brane-worlds
Aug, 200413 pages
Published in:
- Phys.Rev.D 70 (2004) 124008
e-Print:
- hep-th/0408101 [hep-th]
Report number:
- DAMTP-2004-81
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Abstract:
We present a new approximation method for solving the equations of motion for cosmological tensor perturbations in a Randall-Sundrum brane-world model of the type with one brane in a five-dimensional anti-de Sitter spacetime. This method avoids the problem of coordinate singularities inherent in some methods. At leading order, the zero-mode solution replicates the evolution of perturbations in a four-dimensional Friedmann-Robertson-Walker universe in the absence of any tensor component to the matter perturbation on the brane. At next order, there is a mode-mixing effect, although, importantly, the zero-mode does not source any other modes.- 98.80.\x{2013}k
- 04.50.+h
- Randall-Sundrum model
- space-time
- field equations: solution
- fluctuation
- membrane model
- cosmological model
- perturbation: tensor
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