• a-attractors in quintessential inflation motivated by supergravity 

      Aresté Saló, Llibert; Benistry, David; Guendelman, Eduardo I.; Haro Cases, Jaume (American Physical Society, 2021-06-15)
      Article
      Accés obert
      An exponential kind of quintessential inflation potential motivated by supergravity is studied. This type belongs to the class of a-attractor models. The model was studied for the first time by Dimopoulos and Owen in [J. ...
    • 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'editorial
      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, ...
    • Finite-time cosmological singularities and the possible fate of the Universe 

      Haro Cases, Jaume; Nojiri, Shin'ichi; Odintsov, Sergei D.; Oikonomou, Vasilis K.; Pan, Supriya (Elsevier, 2023-09-14)
      Article
      Accés restringit per política de l'editorial
      Singularities in any physical theory are either remarkable indicators of the unknown underlying fundamental theory, or indicate a change in the description of the physical reality. In General Relativity there are three ...
    • Supernovae and dark energy 

      Domínguez, Inmaculada; Bravo Guil, Eduardo; Piersanti, Luciano; Straniero, Oscar; Tornambé, Amedeo (Astronomical Society of the Pacific, 2008)
      Text en actes de congrés
      Accés obert
      A decade ago the observations of thermonuclear supernovae at high-redhifts showed that the expansion rate of the Universe is accelerating and since then, the evidence for cosmic acceleration has gotten stronger. This ...
    • Theoretical and observational bounds on some interacting vacuum energy scenarios 

      Yang, Weiqiang; Pan, Supriya; Aresté Saló, Llibert; Haro Cases, Jaume (American Physical Society, 2021-04-15)
      Article
      Accés obert
      The dynamics of interacting dark matter-dark energy models is characterized through an interaction rate function quantifying the energy flow between these dark sectors. In most of the interaction functions, the expansion ...
    • Understanding the phenomenology of interacting dark energy scenarios and their theoretical bounds 

      Pan, Supriya; Haro Cases, Jaume; Yang, Weiqiang; Amorós Torrent, Jaume (American Physical Society (APS), 2020-06-15)
      Article
      Accés obert
      Nongravitational interaction between dark matter and dark energy has been considered in a spatially flat Friedmann-Lemaître-Robertson-Walker (FLRW) universe. The interaction rate is assumed to be linear in the energy ...