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Title: The cosmology of interacting spin-2 fields

We investigate the cosmology of interacting spin-2 particles, formulating the multi-gravitational theory in terms of vierbeins and without imposing any Deser-van Nieuwen-huizen-like constraint. The resulting multi-vierbein theory represents a wider class of gravitational theories if compared to the corresponding multi-metric models. Moreover, as opposed to its metric counterpart which in general seems to contain ghosts, it has already been proved to be ghost-free. We outline a discussion about the possible matter couplings and we focus on the study of cosmological scenarios in the case of three and four interacting vierbeins. We find rich behavior, including de Sitter solutions with an effective cosmological constant arising from the multi-vierbein interaction, dark-energy solutions and nonsingular bouncing behavior.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Mathematics, University College London, Gower Street, London, WC1E 6BT (United Kingdom)
  2. Physics Division, National Technical University of Athens, 15780 Zografou Campus, Athens (Greece)
  3. Institute for Theoretical Astrophysics, University of Oslo, N-0315 Oslo (Norway)
Publication Date:
OSTI Identifier:
22369769
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2014; Journal Issue: 02; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COSMOLOGICAL CONSTANT; COSMOLOGY; DE SITTER GROUP; DE SITTER SPACE; LIMITING VALUES; MATHEMATICAL SOLUTIONS; METRICS; NONLUMINOUS MATTER; SPIN