Exploració per autor "Elizalde, Emilio"
Ara es mostren els items 1-6 de 6
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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)
Article
Accés restringit per política de l'editorialSeveral 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, ... -
Cosmological perturbations in a class of fully covariant modified theories: application to models with the same background as standard LQC
Haro Cases, Jaume; Aresté Saló, Llibert; Elizalde, Emilio (Springer, 2018-09-01)
Article
Accés obertBouncing cosmologies are obtained by adding to the Einstein–Hilbert action a term of the form -g---vf(¿), with ¿ a scalar depending on the Hubble parameter only, not on its derivatives, and which is here shown to arise ... -
Gravitational particle production in bouncing cosmologies
Haro Cases, Jaume; Elizalde, Emilio (2015-10-13)
Article
Accés obert© 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)
Article
Accés restringit per política de l'editorialParticle 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 ... -
Inflation and late-time acceleration from a double-well potential with cosmological constant
Haro Cases, Jaume; Elizalde, Emilio (2016-06-01)
Article
Accés obertA model of a universe without big bang singularity is presented, which displays an early inflationary period ending just before a phase transition to a kination epoch. The model produces enough heavy particles so as to ... -
Sudden singularities in semiclassical gravity
Haro Cases, Jaume; Amorós Torrent, Jaume; Elizalde, Emilio (2012-06-19)
Article
Accés restringit per política de l'editorialIt 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 ...