2011/09/01 by T. Kobayashi, M. Yamaguchi, J. Yokoyama · 8 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies
paper · pdf · doi:10.1143/ptp.126.511
crossref issued 2011/09/01 · crossref published 2011/09/01 · crossref published-print 2011/09/01 · openalex publication_date 2011/09/01 · crossref created 2011/09/22 · openalex created_date 2016/06/24 · crossref deposited 2017/08/24 · crossref indexed 2026/07/30 · openalex updated_date 2026/07/30
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.