String Generated Gravity Models
Oct, 198515 pages
Published in:
- Phys.Rev.Lett. 55 (1985) 2656
Report number:
- DOE-ER-40048-27 P5
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Abstract: (APS)
Expansion of supersymmetric string theory suggests that the leading quadratic curvature correction to the Einstein action is the Gauss-Bonnet invariant. We show that this model has both flat and anti-de Sitter space as solutions, but that the cosmological branch is unstable, because the graviton becomes a ghost there: The theory solves its own cosmological problem. The general static spherically symmetric solution is exhibited; it is asymptotically Schwarzschild. The sign of the Gauss-Bonnet coefficient determines whether there is a normal event horizon (for the string-generated sign) or a naked singularity. We discuss the effects of higher-curvature corrections and of an explicit cosmological term on stability.- MODEL: STRING
- GRAVITATION: ACTION
- FIELD EQUATIONS: SOLUTION
- COSMOLOGICAL MODEL
- COSMOLOGICAL CONSTANT
- STABILITY
- FIELD THEORY: GHOST
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