Study of a Class of Four Dimensional Nonsingular Cosmological Bounces

Abstract

We study a novel class of nonsingular time-symmetric cosmological bounces. In this class of four dimensional models the bounce is induced by a perfect fluid with a negative energy density. Metric perturbations are solved in an analytic way all through the bounce. The conditions for generating a scale invariant spectrum of tensor and scalar metric perturbations are discussed.

arXiv comment16 pages, 10 figures

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