Study of a class of four-dimensional non-singular cosmological bounces

Fabio Finelli
2003 Journal of Cosmology and Astroparticle Physics  
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.
doi:10.1088/1475-7516/2003/10/011 fatcat:g6wv5vdzbbexhlllnapkkfv2de