Seeding of primordial perturbations during a decelerated expansion

2006/09/30 by Yun-Song Piao · 4 citations
Mathematics · Physics and Astronomy · #Astronomy #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Field (mathematics) #Geometry #Mathematics #Metric expansion of space #Observable #Perturbation (astronomy) #Physics #Quantum mechanics #Scalar (mathematics) #Scalar field #Seeding #Theoretical physics #Thermodynamics #gr-qc

paper · pdf · doi:10.1103/physrevd.75.063517

published as Phys.Rev.D75:063517,2007 · 5 pages, 3 figures, more details and clarifications added, refs. added, new version with 6 pages has been splitted into various sections, to be published in PRD, v3, matched to published version

openalex publication_date 2007/03/26 · arxiv created 2007/05/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A scalar field with a modified dispersion relation may seed, under certain conditions, the primordial perturbations during a decelerated expansion. In this paper we examine whether and how these perturbations can be responsible for the structure formation of the observable universe. We discuss relevant difficulties and possible solutions.

Citations

• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• The development of irregularities in a single bubble inflationary universe
• Generally covariant model of a scalar field with high frequency dispersion and the cosmological horizon problem
• Cosmological perturbations from inhomogeneous reheating, freeze-out, and mass domination
• Cosmology for Grand Unified Theories with Radiatively Induced Symmetry Breaking
• Primordial perturbations of test scalar fields
• Dynamics of phase transition in the new inflationary universe scenario and generation of perturbations
• Nearly scale-invariant spectrum of adiabatic fluctuations may be from a very slowly expanding phase of the Universe
• Is the island universe model consistent with observations?
• SUPERLUMINARY UNIVERSE: A POSSIBLE SOLUTION TO THE INITIAL VALUE PROBLEM IN COSMOLOGY
• Spontaneous creation of almost scale-free density perturbations in an inflationary universe
• A time varying speed of light as a solution to cosmological puzzles
• Fluctuations in the New Inflationary Universe
• Trans-Planckian problem of inflationary cosmology

Cited by

• Speedy Sound and Cosmic Structure
• Horizon-preserving dualities and perturbations in non-canonical scalar field cosmologies
• Primordial perturbations during a slow expansion
• Flow in cyclic cosmology