2000/02/29 by P. P. Avelino, C. J. A. P. Martins · 1 citation
Physics and Astronomy · #Adiabatic process #Astrophysics #COSMIC cancer database #Classical mechanics #Context (archaeology) #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Gaussian #Metric (unit) #Non-Gaussianity #Physics #Primordial fluctuations #Quantum mechanics #Scalar (mathematics) #Scalar field #Solar and Space Plasma Dynamics #Spectral density #Statistical physics #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevlett.85.1370
published as Phys.Rev.Lett. 85 (2000) 1370-1373 · 5 LaTeX pages, no figures; version to appear in Phys. Rev. Lett
arxiv created 2000/06/30 · openalex publication_date 2000/08/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the context of "two-metric" theories of gravity there is the possibility that cosmic defects will produce a spectrum of primordial adiabatic density perturbations, when the speed characterizing the defect-producing scalar field is much larger than the speed characterizing gravity and standard model particles. This model will exactly mimic the standard predictions of inflationary models, with the exception of a small non-Gaussian signal which could be detected by future experiments.