From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology

Details From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology

2009-08-03

arxiv.org/abs/0908.0192v2

Phys.Rev.D81:083533,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

20 pages, 5 figures, added more sentences, references, and an appendix to explain our inflation model

Scientific paper

10.1103/PhysRevD.81.083533

We study the inflation process of universe based on the renormalizable quantum gravity formulated as a conformal field theory (CFT). We show that the power-law CFT spectrum approaches to that of the Harrison-Zel'dovich-Peebles type as the amplitude of gravitational potential gradually reduces during the inflation. The non-Gaussanity parameter is preserved within order of unity due to the diffeomorphism invariance. Sharp fall-off of the angular power spectrum of cosmic microwave background (CMB) at large scale is understood as a consequence of the existence of dynamical scale of the quantum gravity \Lambda_QG (\simeq 10^{17})GeV. The angular power spectra are computed and compared with the WMAP5 and ACBAR data with a quality of \chi^2/dof \simeq 1.1.

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