Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 3, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2006/03/009
Keywords
string theory and cosmology; gravity; quantum gravity phenomenology; physics of the early universe
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We consider the effects on cosmology of higher derivative modi. cations of gravity that make it asymptotically free without introducing ghosts. The weakening of gravity at short distances allows pressure to prevent a singularity, producing a solution with contraction preceding expansion.
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