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Bouncing Universes in String-inspired Gravity

Research output: Contribution to journalJournal article


Article number9
Journal publication date13/03/2006
JournalJournal of Cosmology and Astroparticle Physics
Original languageEnglish


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