Bouncing universes in string-inspired gravity
Aug, 200528 pages
Published in:
- JCAP 03 (2006) 009
e-Print:
- hep-th/0508194 [hep-th]
Report number:
- YITP-SB-05-23,
- NORDITA-2005-53
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Abstract:
We consider the effects on cosmology of higher-derivative modifications of (effective) gravity that make it asymptotically free without introducing ghosts. The weakening of gravity at short distances allows pressure to prevent the singularity, producing a solution with contraction preceding expansion.- cosmology
- string
- quantum gravity
- string model
- effective action
- gravitation: action
- derivative: high
- ghost
- asymptotic freedom
- field equations: solution
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