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Nonperturbative analysis of the evolution of cosmological perturbations through a nonsingular bounce

Author(s): Xue, BingKan; Garfinkle, David; Pretorius, Frans; Steinhardt, Paul J

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dc.contributor.authorXue, BingKan-
dc.contributor.authorGarfinkle, David-
dc.contributor.authorPretorius, Frans-
dc.contributor.authorSteinhardt, Paul J-
dc.date.accessioned2018-07-20T15:08:22Z-
dc.date.available2018-07-20T15:08:22Z-
dc.date.issued2013-10-15en_US
dc.identifier.citationXue, BingKan, Garfinkle, David, Pretorius, Frans, Steinhardt, Paul J. (2013). Nonperturbative analysis of the evolution of cosmological perturbations through a nonsingular bounce. PHYSICAL REVIEW D, 88 (10.1103/PhysRevD.88.083509en_US
dc.identifier.issn1550-7998-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1508r-
dc.description.abstractIn bouncing cosmology, the primordial fluctuations are generated in a cosmic contraction phase before the bounce into the current expansion phase. For a nonsingular bounce, curvature and anisotropy grow rapidly during the bouncing phase, raising questions about the reliability of perturbative analysis. In this paper, we study the evolution of adiabatic perturbations in a nonsingular bounce by nonperturbative methods including numerical simulations of the nonsingular bounce and the covariant formalism for calculating nonlinear perturbations. We show that the bounce is disrupted in regions of the universe with significant inhomogeneity and anisotropy over the background energy density but is achieved in regions that are relatively homogeneous and isotropic. Sufficiently small perturbations, consistent with observational constraints, can pass through the nonsingular bounce with negligible alteration from nonlinearity. We follow scale invariant perturbations generated in a matterlike contraction phase through the bounce. Their amplitude in the expansion phase is determined by the growing mode in the contraction phase, and the scale invariance is well preserved across the bounce.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.titleNonperturbative analysis of the evolution of cosmological perturbations through a nonsingular bounceen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.1103/PhysRevD.88.083509-
dc.date.eissued2013-10-10en_US
dc.identifier.eissn1550-2368-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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