Consistent Lorentz violation in flat and curved space

Gia Dvali, Oriol Pujolàs, Michele Redi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Motivated by the severity of the bounds on Lorentz violation in the presence of ordinary gravity, we study frameworks in which Lorentz violation does not affect the spacetime geometry. We show that there are at least two inequivalent classes of spontaneous Lorentz breaking that even in the presence of gravity result in Minkowski space. The first one generically corresponds to the condensation of tensor fields with tachyonic mass, which in turn is related to ghost condensation. In the second class, realized by the Dvali-Gabadadze- Porrati model or theories of massive gravitons, spontaneous Lorentz breaking is induced by the expectation value of sources. The generalization to de Sitter space is also discussed.

    Original languageEnglish (US)
    Article number044028
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Volume76
    Issue number4
    DOIs
    StatePublished - Aug 30 2007

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Physics and Astronomy (miscellaneous)

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