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Title: Accelerated expansion of the universe à la the Stueckelberg mechanism

We investigate a cosmological model in which the Stueckelberg fields are non-minimally coupled to the scalar curvature in a gauge invariant manner. We present not only a solution that can be considered in the context of the late time acceleration of the universe but also a solution compatible with the inflationary cosmology. Distinct behaviors of the scalar and vector fields together with the real valued mass gained by the Stueckelberg mechanism lead the universe to go through the two different accelerated expansion phases with a decelerated expansion phase between them. On the other hand, in the solutions we present, if the mass is null then the universe is either static or exhibits a simple power law expansion due to the vector field potential.
Authors:
 [1] ; ; ;  [2]
  1. Department of Physics, Koç University, Sarıyer, İstanbul, 34450 Turkey (Turkey)
  2. Department of Physics, Boğaziçi University, Bebek, İstanbul, 34342 Turkey (Turkey)
Publication Date:
OSTI Identifier:
22375907
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 07; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 97 MATHEMATICAL METHODS AND COMPUTING; ACCELERATION; COSMOLOGICAL MODELS; COSMOLOGY; EXPANSION; GAUGE INVARIANCE; MASS; MATHEMATICAL SOLUTIONS; POTENTIALS; SCALARS; UNIVERSE; VECTOR FIELDS