Strong coupling versus 4D locality in induced gravity

M. Porrati, J. W. Rombouts

    Research output: Contribution to journalArticle

    Abstract

    We reexamine the problem of strong coupling in a regularized version of Dvali-Gabadadze-Porrati (DGP) (or "brane-induced") gravity. We find that the regularization of Kolanovic, Porrati, and Rombouts [Phys. Rev. D 68, 064018 (2003)] differs from DGP in that it does not exhibit strong coupling or ghosts up to cubic order in the interactions. We suggest that the nonlocal nature of the theory, when written in terms of the 4D metric, is a plausible reason for this phenomenon. Finally, we briefly discuss the possible behavior of the model at higher order in perturbation theory.

    Original languageEnglish (US)
    Article number122003
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume69
    Issue number12
    DOIs
    StatePublished - 2004

    Fingerprint

    gravitation
    ghosts
    perturbation theory
    interactions

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Strong coupling versus 4D locality in induced gravity. / Porrati, M.; Rombouts, J. W.

    In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 69, No. 12, 122003, 2004.

    Research output: Contribution to journalArticle

    @article{71daece771ae4993acfa8247b8adcbbe,
    title = "Strong coupling versus 4D locality in induced gravity",
    abstract = "We reexamine the problem of strong coupling in a regularized version of Dvali-Gabadadze-Porrati (DGP) (or {"}brane-induced{"}) gravity. We find that the regularization of Kolanovic, Porrati, and Rombouts [Phys. Rev. D 68, 064018 (2003)] differs from DGP in that it does not exhibit strong coupling or ghosts up to cubic order in the interactions. We suggest that the nonlocal nature of the theory, when written in terms of the 4D metric, is a plausible reason for this phenomenon. Finally, we briefly discuss the possible behavior of the model at higher order in perturbation theory.",
    author = "M. Porrati and Rombouts, {J. W.}",
    year = "2004",
    doi = "10.1103/PhysRevD.69.122003",
    language = "English (US)",
    volume = "69",
    journal = "Physical review D: Particles and fields",
    issn = "1550-7998",
    publisher = "American Institute of Physics",
    number = "12",

    }

    TY - JOUR

    T1 - Strong coupling versus 4D locality in induced gravity

    AU - Porrati, M.

    AU - Rombouts, J. W.

    PY - 2004

    Y1 - 2004

    N2 - We reexamine the problem of strong coupling in a regularized version of Dvali-Gabadadze-Porrati (DGP) (or "brane-induced") gravity. We find that the regularization of Kolanovic, Porrati, and Rombouts [Phys. Rev. D 68, 064018 (2003)] differs from DGP in that it does not exhibit strong coupling or ghosts up to cubic order in the interactions. We suggest that the nonlocal nature of the theory, when written in terms of the 4D metric, is a plausible reason for this phenomenon. Finally, we briefly discuss the possible behavior of the model at higher order in perturbation theory.

    AB - We reexamine the problem of strong coupling in a regularized version of Dvali-Gabadadze-Porrati (DGP) (or "brane-induced") gravity. We find that the regularization of Kolanovic, Porrati, and Rombouts [Phys. Rev. D 68, 064018 (2003)] differs from DGP in that it does not exhibit strong coupling or ghosts up to cubic order in the interactions. We suggest that the nonlocal nature of the theory, when written in terms of the 4D metric, is a plausible reason for this phenomenon. Finally, we briefly discuss the possible behavior of the model at higher order in perturbation theory.

    UR - http://www.scopus.com/inward/record.url?scp=3843140415&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=3843140415&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevD.69.122003

    DO - 10.1103/PhysRevD.69.122003

    M3 - Article

    VL - 69

    JO - Physical review D: Particles and fields

    JF - Physical review D: Particles and fields

    SN - 1550-7998

    IS - 12

    M1 - 122003

    ER -