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Evolution of curvature and anisotropy near a nonsingular bounce

Author(s): Xue, BingKan; Steinhardt, Paul J.

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dc.contributor.authorXue, BingKan-
dc.contributor.authorSteinhardt, Paul J.-
dc.date.accessioned2019-03-27T19:56:48Z-
dc.date.available2019-03-27T19:56:48Z-
dc.date.issued2011-10-15en_US
dc.identifier.citationXue, BingKan, Steinhardt, Paul J. (2011). Evolution of curvature and anisotropy near a nonsingular bounce. PHYSICAL REVIEW D, 84, doi:10.1103/PhysRevD.84.083520en_US
dc.identifier.issn1550-7998-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1rt27-
dc.description.abstractWe consider bouncing cosmologies in which an ekpyrotic contraction phase with w >> 1 is followed by a bouncing phase with w < - 1 that violates the null energy condition. The bouncing phase, induced by ghost condensation, is designed to produce a classically nonsingular bounce at a finite value of the scale factor. We show that the initial curvature and anisotropy, though diluted during the ekpyrotic phase, grow back exponentially during the bouncing phase. Moreover, curvature perturbations and anisotropy are generated by quantum fluctuations during the ekpyrotic phase. In the bouncing phase, however, an adiabatic curvature perturbation grows to dominate and contributes a blue spectrum that spoils the scale invariance. Meanwhile, a scalar shear perturbation grows nonlinear and creates an overwhelming anisotropy that disrupts the nonsingular bounce altogether.en_US
dc.language.isoen_USen_US
dc.relation.ispartofPHYSICAL REVIEW Den_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleEvolution of curvature and anisotropy near a nonsingular bounceen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1103/PhysRevD.84.083520-
dc.date.eissued2011-10-19en_US
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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