Cosmological Perturbations in Brane-World Theories: Formalism
arXiv:hep-th/0005032 · doi:10.1103/PhysRevD.62.123515
Abstract
We develop a gauge-invariant formalism to describe metric perturbations in five-dimensional brane-world theories. In particular, this formalism applies to models originating from heterotic M-theory. We introduce a generalized longitudinal gauge for scalar perturbations. As an application, we discuss some aspects of the evolution of fluctuations on the brane. Moreover, we show how the five-dimensional formalism can be matched to the known four-dimensional one in the limit where an effective four-dimensional description is appropriate.
16 pages, no figure, matches version to appear in PRD
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