Conformal invariance of curvature perturbation

Jinn Ouk Gong, Jai Chan Hwang, Wan Il Park, Misao Sasaki, Yong Seon Song

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

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 δN formalism, and show its conformal invariance.

Original languageEnglish
Article number023
JournalJournal of Cosmology and Astroparticle Physics
Volume2011
Issue number9
DOIs
StatePublished - Sep 2011

Keywords

  • Modified gravity
  • cosmological perturbation theory
  • inflation

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