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Original Paper
Cosmologies from higher-order string corrections
Article first published online: 3 APR 2006
DOI: 10.1002/andp.200510189
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
1521-3889/asset/cover.gif?v=1&s=294b277cbfffc09eca8e330fc1e2b8eca0869908 "Annalen der Physik")
Additional Information
How to Cite
Tsujikawa, S. (2006), Cosmologies from higher-order string corrections. Ann. Phys., 15: 302–315. doi: 10.1002/andp.200510189
Publication History
- Issue published online: 3 APR 2006
- Article first published online: 3 APR 2006
- Manuscript Accepted: 13 FEB 2006
- Manuscript Revised: 25 JAN 2006
- Manuscript Received: 4 NOV 2005
- Abstract
- References
- Cited By
Keywords:
- String theory;
- curvature corrections;
- dark energy
Abstract
We study cosmologies based on low-energy effective string theory with higher-order string corrections to a tree-level action and with a modulus scalar field (dilaton or compactification modulus). In the presence of such corrections it is possible to construct nonsingular cosmological solutions in the context of Pre-Big-Bang and Ekpyrotic universes. We review the construction of nonsingular bouncing solutions and resulting density perturbations in Pre-Big-Bang and Ekpyrotic models. We also discuss the effect of higher-order string corrections on a dark energy universe and show several interesting possibilities of the avoidance of future singularities.