Observable consequences of strong coupling in theories with large distance modified gravity

Gia Dvali

    Research output: Contribution to journalArticle

    Abstract

    In this talk, we review theories that modify gravity at cosmological distances, and show that any such theory must exhibit a strong coupling phenomenon. We show that all consistent theories that modify the dynamics of the spin-2 graviton on asymptotically flat backgrounds, automatically have this property. Due to the strong coupling effect, modification of the gravitational force is source-dependent, and for lighter sources sets in at shorter distances. This universal feature makes modified gravity theories predictive and potentially testable by precision gravitational measurements at scales much shorter than the current cosmological horizon.

    Original languageEnglish (US)
    Pages (from-to)2013-2021
    Number of pages9
    JournalInternational Journal of Modern Physics D
    Volume16
    Issue number12 A
    StatePublished - Dec 2007

    Fingerprint

    Modified Gravity
    Strong Coupling
    gravity
    gravitation
    gravitons
    horizon
    Horizon
    Gravity
    Dependent

    Keywords

    • Dark energy
    • Modified gravity
    • Strong coupling

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Mathematical Physics
    • Astronomy and Astrophysics

    Cite this

    Observable consequences of strong coupling in theories with large distance modified gravity. / Dvali, Gia.

    In: International Journal of Modern Physics D, Vol. 16, No. 12 A, 12.2007, p. 2013-2021.

    Research output: Contribution to journalArticle

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