articleProgress of Theoretical PhysicsSep 1, 2011BRONZE OA

Generalized G-Inflation: --Inflation with the Most General Second-Order Field Equations--

TKT. KobayashiMYM. YamaguchiJYJ. Yokoyama

Kyoto University · Tokyo Institute of Technology · +2 more institutions

Indexed inarxivcrossref

Abstract

We study generalized Galileons as a framework to develop the most general single-field inflation models ever, Generalized G-inflation, containing yet further generalization of Ginflation, as well as previous examples such as k-inflation, extended inflation, and new Higgs inflation as special cases. We investigate the background and perturbation evolution in this model, calculating the most general quadratic actions for tensor and scalar cosmological perturbations to give the stability criteria and the power spectra of primordial fluctuations. It is pointed out in the Appendix that the Horndeski theory and the generalized Galileons are equivalent. In particular, even the non-minimal coupling to the Gauss-Bonnet…

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Authors

3
  • TK
    T. KobayashiCorresponding

    Kyoto University

  • MY
    M. Yamaguchi

    Tokyo Institute of Technology

  • JY
    J. Yokoyama

    Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo

Topics & keywords

Topics
Keywords
  • Quadratic equation
  • Inflation (cosmology)
  • Generalization
  • Perturbation (astronomy)
  • Scalar (mathematics)
  • Tensor (intrinsic definition)
  • Perturbation theory (quantum mechanics)
  • Scalar field
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