1 research outputs found
Conformal invariance of curvature perturbation
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.Comment: 15 pages, 1 figur