Gravitational particle production in bouncing cosmologies

Jaume Haro, Emilio Elizalde

    Research output: Contribution to journalArticleResearchpeer-review

    23 Citations (Scopus)

    Abstract

    © 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 contracting regime. To this end, it is shown that, in the context of Loop Quantum Cosmology, gravitational production of massive particles conformally coupled with gravity in a matter-ekpyrotic bouncing Universe, where the sudden phase transition occurs in the contracting regime, yields a reheating temperature which is in good agreement with cosmological observations.
    Original languageEnglish
    Article number028
    JournalJournal of Cosmology and Astroparticle Physics
    Volume2015
    Issue number10
    DOIs
    Publication statusPublished - 13 Oct 2015

    Keywords

    • alternatives to inflation
    • quantum field theory on curved space

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