Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-07-26
Phys.Rev.D74:123502,2006
Astronomy and Astrophysics
Astrophysics
30 pages, 6 figures. Version to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.74.123502
We propose an evolutional scenario of the universe which starts from quantum states with conformal invariance, passing through the inflationary era, and then makes transition to the conventional Einstein space-time. The space-time dynamics is derived from the renormalizable higher-derivative quantum gravity developed on the basis of a renormalizable conformal gravity in four dimensions. Based on the linear perturbation theory in the inflationary background, we simulate evolutions of gravitational scalar, vector and tensor perturbations, and evaluate the spectra at the transition point located at the beginning of the big bang. The obtained spectra cover the range of the primordial spectra for explaining the tiny anisotropy in the homogeneous CMB.
Hamada Ken-ji
Horata Shinichi
Yukawa Tetsuyuki
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