Braneworld flattening by a cosmological constant

Cedric Deffayet, Gia Dvali, Gregory Gabadadze, Arthur Lue

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We present a model with an infinite volume bulk in which a braneworld with a cosmological constant evolves to a static, four-dimensional Minkowski spacetime. This evolution occurs for a generic class of initial conditions with positive energy densities. The metric everywhere outside the brane is that of a five-dimensional Minkowski spacetime, where the effect of the brane is the creation of a frame with a varying speed of light. This fact is encoded in the structure of the four-dimensional graviton propagator on the braneworld, which may lead to some interesting Lorentz symmetry violating effects. In our framework the cosmological constant problem takes a different meaning, since the flatness of the Universe is guaranteed for an arbitrary negative cosmological constant. Instead, constraints on the model come from different concerns which we discuss in detail.

    Original languageEnglish (US)
    Article number104002
    Pages (from-to)1040021-1040029
    Number of pages9
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume64
    Issue number10
    StatePublished - Nov 15 2001

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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