Gravity localization on string - like defects in codimension two and the AdS / CFT correspondence
Dec, 200021 pages
Published in:
- JHEP 02 (2001) 042
e-Print:
- hep-th/0012033 [hep-th]
Report number:
- YCTP-P11-00
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Abstract:
We study the localization of gravity on string-like defects in codimension two. We point out that the gravity-localizing `local cosmic string' spacetime has an orbifold singularity at the horizon. The supergravity embedding and the AdS/CFT correspondence suggest ways to resolve the singularity. We find two resolutions of the singularity that have a semiclassical gravity description and study their effect on the low-energy physics on the defect. The first resolution leads, at long distances, to a codimension one Randall-Sundrum scenario. In the second case, the infrared physics is like that of a conventional finite-size Kaluza-Klein compactification, with no power-law corrections to the gravitational potential. Similar resolutions apply also in higher codimension gravity-localizing backgrounds.- field theory: conformal
- space-time: anti-de Sitter
- astrophysics: string
- gravitation: local
- orbifold: singularity
- supergravity
- Randall-Sundrum model
- Kaluza-Klein model
- mass: gap
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