1999/05/13 by David Langlois · 226 citations
Physics and Astronomy · #Adiabatic process #Anisotropy #Bispectrum #Cosmic microwave background #Cosmology and Gravitation Theories #Fluctuation spectrum #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Multipole expansion #Non-Gaussianity #Perturbation (astronomy) #Physics #Primordial fluctuations #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Solar and Space Plasma Dynamics #Spectral density #Spectral line #Statistical physics #Statistics #Theoretical physics #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.59.123512
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 59(12) (American Physical Society) · 23 pages, 7 figures, RevTex. To appear in Phys. Rev. D
openalex publication_date 1999/05/13 · arxiv created 1999/06/04 · arxiv updated 2016/08/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
It is shown that double inflation (two minimally coupled massive scalar fields) can produce correlated adiabatic and isocurvature primordial perturbations. Depending on the two relevant parameters of the model, the contributions to the primordial perturbations are computed, with special emphasis on the correlation, which can be quantitatively represented by a correlation spectrum. Finally the primordial spectra are evolved numerically to obtain the CMBR anisotropy multipole expectation values. It turns out that the existence of mixing and correlation can alter very significantly the temperature fluctuation predictions.