Quantum compositeness of gravity: Black holes, AdS and inflation

Gia Dvali, Cesar Gomez

    Research output: Contribution to journalArticle

    Abstract

    Gravitational backgrounds, such as black holes, AdS, de Sitter and inflationary universes, should be viewed as composite of N soft constituent gravitons. It then follows that such systems are close to quantum criticality of graviton Bose-gas to Bose-liquid transition. Generic properties of the ordinary metric description, including geodesic motion or particle-creation in the background metric, emerge as the large-N limit of quantum scattering of constituent longitudinal gravitons. We show that this picture correctly accounts for physics of large and small black holes in AdS, as well as reproduces well-known inflationary predictions for cosmological parameters. However, it anticipates new effects not captured by the standard semi-classical treatment. In particular, we predict observable corrections that are sensitive to the inflationary history way beyond last 60 e-foldings. We derive an absolute upper bound on the number of e-foldings, beyond which neither de Sitter nor inflationary Universe can be approximated by a semi-classical metric. However, they could in principle persist in a new type of quantum eternity state. We discuss implications of this phenomenon for the cosmological constant problem.

    Original languageEnglish (US)
    Article number023
    JournalJournal of Cosmology and Astroparticle Physics
    Volume2014
    Issue number1
    DOIs
    StatePublished - Jan 1 2014

    Keywords

    • cosmological perturbation theory
    • dark energy theory
    • gravity
    • ination

    ASJC Scopus subject areas

    • Astronomy and Astrophysics

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