Phys. Rev. D 69, 122003 (2004) [9 pages]Strong coupling versus 4D locality in induced gravityReceived 11 February 2004; published 29 June 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.69.122003
DOI:
10.1103/PhysRevD.69.122003
PACS:
11.25.Wx, 04.50.+h, 11.10.Kk
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.