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Conformal invariance of curvature perturbation

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arxiv 1107.1840 v1 pith:TPCP5PCG submitted 2011-07-10 gr-qc astro-ph.COhep-phhep-th

Conformal invariance of curvature perturbation

Jinn-Ouk Gong , Jai-chan Hwang , Wan Il Park , Misao Sasaki , Yong-Seon Song This is my paper
classification gr-qc astro-ph.COhep-phhep-th
keywords perturbationconformalconformallyinvarianceinvariantordersslicingapply
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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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