From CFT Spectra to CMB Multipoles in Quantum Gravity Cosmology
arXiv:0908.0192 · doi:10.1103/PhysRevD.81.083533
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 Λ_QG (\simeq 10^{17})GeV. The angular power spectra are computed and compared with the WMAP5 and ACBAR data with a quality of χ^2/dof \simeq 1.1.
20 pages, 5 figures, added more sentences, references, and an appendix to explain our inflation model
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Cited by in corpus (10)
- Conformal Invariance, Dark Energy, and CMB Non-Gaussianity
- Background Free Quantum Gravity based on Conformal Gravity and Conformal Field Theory on M^4
- BRST Analysis of Physical Fields and States for 4D Quantum Gravity on R x S^3
- Two-Loop Quantum Gravity Corrections to Cosmological Constant in Landau Gauge
- RG Analysis for Quantum Gravity with A Single Dimensionless Coupling
- BRST Invariant Higher Derivative Operators in 4D Quantum Gravity based on CFT
- Diffeomorphism Invariance Demands Conformal Anomalies
- Physical Cosmological Constant in Asymptotically Background Free Quantum Gravity
- Localized massive excitation of quantum gravity as a dark particle
- Quantum Gravity Effective Action Provides Entropy of The Universe