Conformal invariance of curvature perturbation

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

doi:10.1088/1475-7516/2011/09/023

Conformal invariance of curvature perturbation

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

Department of Science Education

Research output: Contribution to journal › Article › peer-review

63 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 language	English
Article number	023
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2011
Issue number	9
DOIs	https://doi.org/10.1088/1475-7516/2011/09/023
State	Published - Sep 2011

Keywords

cosmological perturbation theory
inflation
Modified gravity

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10.1088/1475-7516/2011/09/023

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title = "Conformal invariance of curvature perturbation",

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.",

keywords = "cosmological perturbation theory, inflation, Modified gravity",

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AU - Hwang, Jai Chan

AU - Park, Wan Il

AU - Sasaki, Misao

AU - Song, Yong Seon

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Y1 - 2011/9

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AB - 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.

KW - cosmological perturbation theory

KW - inflation

KW - Modified gravity

UR - https://www.scopus.com/pages/publications/80053513634

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DO - 10.1088/1475-7516/2011/09/023

M3 - Article

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VL - 2011

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

IS - 9

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ER -

Conformal invariance of curvature perturbation

Abstract

Keywords

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