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Metastable gravity on classical defects

Christophe Ringeval*

Jan-Willem Rombouts†

  • Blackett Laboratory, Imperial College, Prince Consort Road, London SW7 2AZ, United Kingdom

  • Department of Physics, New York University, 4 Washington Place, New York, New York 10003, USA

  • *Electronic address: c.ringeval@imperial.ac.uk
  • †Electronic address: jwr218@nyu.edu
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Phys. Rev. D 71, 044001 – Published 1 February, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.044001

Abstract

We discuss the realization of metastable gravity on classical defects in infinite-volume extra dimensions. In dilatonic Einstein gravity, it is found that the existence of metastable gravity on the defect core requires violation of the dominant energy condition for codimension Nc=2 defects. This is illustrated with a detailed analysis of a six-dimensional hyperstring minimally coupled to dilaton gravity. We present the general conditions under which a codimension Nc>2 defect admits metastable modes, and find that they differ from lower codimensional models in that, under certain conditions, they do not require violation of energy conditions to support quasilocalized gravity.

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Phys. Rev. D 71, 044001– Published 1 February, 2005
  • Received 30 November 2004

© 2005 American Physical Society

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