Now showing items 1-7 of 7

  • 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
    Open Access
    Bouncing 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 ...
  • Qualitative study in loop quantum cosmology 

    Aresté Saló, Llibert; Amorós Torrent, Jaume; Haro Cases, Jaume (2017-12-07)
    Article
    Restricted access - publisher's policy
    This work contains a detailed qualitative analysis, in general relativity and in loop quantum cosmology, of the dynamics in the associated phase space of a scalar field minimally coupled with gravity, whose potential mimics ...
  • Quintessential inflation at low reheating temperatures 

    Aresté Saló, Llibert; Haro Cases, Jaume (2017-11-23)
    Article
    Open Access
    We have tested some simple quintessential inflation models, imposing the requirement that they match with the recent observational data provided by the BICEP and Planck team and leading to a reheating temperature, which ...
  • Reheating constraints in quintessential inflation 

    Haro Cases, Jaume; Aresté Saló, Llibert (2017-06-02)
    Article
    Open Access
    We study the consequences of reheating in quintessential inflation. From simple inflationary quintessential models introduced by de Haro, Amorós, and Pan in [Phys. Rev. D 93, 084018 (2016)] and [Phys. Rev. D 94, 064060 ...
  • Reheating via gravitational particle production in simple models of quintessence or ¿CDM Inflation 

    Haro Cases, Jaume; Aresté Saló, Llibert (2017-11-14)
    Article
    Open Access
    We have tested some simple CDM (the same test is also valid for quintessence) inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck’s team and leading to a reheating ...
  • Singularities and qualitative study in LQC 

    Aresté Saló, Llibert (Universitat Politècnica de Catalunya, 2017-01)
    Bachelor thesis
    Open Access
    We will perform a detailed analysis of singularities in Einstein Cosmology and in LQC (Loop Quantum Cosmology). We will obtain explicit analytical expressions for the energy density and the Hubble constant for a given set ...
  • The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology 

    Haro Cases, Jaume; Amorós Torrent, Jaume; Aresté Saló, Llibert (2017-09-01)
    Article
    Open Access
    We will perform a detailed study of the matter-ekpyrotic bouncing scenario in Loop Quantum Cosmology using the methods of the dynamical systems theory. We will show that when the background is driven by a single scalar ...