Generalized G-Inflation : Inflation with the Most General Second-Order Field Equations(Astrophysics and Cosmology)
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概要
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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 G-inflation, 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 term is included in the generalized Galileons in a non-trivial manner.
- 2011-09-25
著者
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YOKOYAMA Junichi
Research Center for the Early Universe, School of Science, The University of Tokyo
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Yamaguchi Masahide
Department Of Dermatology Kawasaki Medical School
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Yokoyama Jun'ichi
Research Center For The Early Universe (resceu) Graduate School Of Science The University Of Tokyo:i
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Yamaguchi Masahide
Department Of Physics Tokyo Institute Of Technology
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Kobayashi Tsutomu
Hakubi Center Kyoto University:department Of Physics Kyoto University
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Yokoyama Jun'ichi
Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo
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YOKOYAMA Jun'ichi
Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo:Institute for the Physics and Mathematics of the Universe, The University of Tokyo
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YAMAGUCHI Masahide
Department of Physics, Tokyo Institute of Technology
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KOBAYASHI Tsutomu
Hakubi Center, Kyoto University:Department of Physics, Kyoto University
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