Conformal invariance of curvature perturbation

Details Conformal invariance of curvature perturbation Conformal invariance of curvature perturbation

2011-07-10

arxiv.org/abs/1107.1840v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 1 figure

Scientific paper

We show that in the single component situation all perturbation variables in the comoving gauge are conformally invariant to all perturbation orders. Generally we identify a special time slicing, the uniform-conformal transformation slicing, where all perturbations are again conformally invariant to all perturbation orders. We apply this result to the delta N formalism, and show its conformal invariance.

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