From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology
Abstract
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.
Cite
@article{arxiv.0908.0192,
title = {From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology},
author = {Ken-ji Hamada and Shinichi Horata and Tetsuyuki Yukawa},
journal= {arXiv preprint arXiv:0908.0192},
year = {2010}
}
Comments
20 pages, 5 figures, added more sentences, references, and an appendix to explain our inflation model