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Bouncing Universes in String-inspired Gravity

Research output: Contribution to journalJournal article


Article number9
<mark>Journal publication date</mark>13/03/2006
<mark>Journal</mark>Journal of Cosmology and Astroparticle Physics
<mark>Original language</mark>English


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.

Bibliographic note

28 pages, 2 figures; v2: added references