2015/06/16 by Donato Bini, Giampiero Esposito, Bini, Donato +1
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Noncommutative and Quantum Gravity Theories #Quantum Electrodynamics and Casimir Effect
paper · pdf · doi:10.48550/arxiv.1506.04984
openalex publication_date 2015/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
An assessment is made of recent attempts to evaluate how quantum gravity may\naffect the anisotropy spectrum of the cosmic microwave background. A\nperturbative scheme for the solution of the Wheeler-DeWitt equation has been\nfound to allow for enhancement of power at large scales, whereas the\nalternative predicts a suppression of power at large scales. Both effects are\ncorrections which, although conceptually interesting, turn out to be too small\nto be detected. Another scheme relies upon a Born-Oppenheimer analysis: by\nusing a perturbative approach to the nonlinear ordinary differential equation\nobeyed by the two-point function for scalar fluctuations, a new family of power\nspectra have been obtained and studied by the authors.\n