Now showing items 1-4 of 4

  • Brane cosmology from observational surveys and its comparison with standard FRW cosmology 

    Astashenok, Artyom V.; Elizalde, Emilio; Haro Cases, Jaume; Odintsov, Sergei D.; Yurov, Artyom V. (2013-09)
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    Several simple dark energy models on the brane are investigated. They are compared with corresponding models in the frame of 4d Friedmann-Robertson-Walker cosmology. For constraining the parameters of the models considered, ...
  • Gravitational particle production in bouncing cosmologies 

    Haro Cases, Jaume; Elizalde, Emilio (2015-10-13)
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    © 2015 IOP Publishing Ltd and Sissa Medialab srl . It is argued that the Universe reheating in bouncing cosmologies could be explained via gravitational particle production, as due to a sudden phase transition in the ...
  • Gravitational Particle Production in Massive Chaotic Inflation and the Moduli Problem 

    Haro Cases, Jaume; Elizalde, Emilio (2012-02)
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    Particle production from vacuum fluctuations during inflation is briefly revisited. The moduli problem occurring with light particles produced at the end of inflation is addressed, namely the fact that some results are in ...
  • Sudden singularities in semiclassical gravity 

    Haro Cases, Jaume; Amorós Torrent, Jaume; Elizalde, Emilio (2012-06-19)
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    It has been claimed in a recent paper [J. D. Barrow, A. B. Batista, J. C. Fabris, M. J. S. Houndjo, and G. Dito, Phys. Rev. D 84, 123518 (2011).] that sudden singularities will survive in semiclassical gravity. This issue ...