Exact non-linear equations for cosmological perturbations

Jinn Ouk Gong, Jai Chan Hwang, Hyerim Noh, David Chan Lon Wu, Jaiyul Yoo

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We present a complete set of exact and fully non-linear equations describing all three types of cosmological perturbations - scalar, vector and tensor perturbations. We derive the equations in a thoroughly gauge-ready manner, so that any spatial and temporal gauge conditions can be employed. The equations are completely general without any physical restriction except that we assume a flat homogeneous and isotropic universe as a background. We also comment briefly on the application of our formulation to the non-expanding Minkowski background.

Original languageEnglish
Article number027
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number10
DOIs
StatePublished - 18 Oct 2017

Keywords

  • cosmological perturbation theory
  • gravity

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