Talk detail

Participant	Pinto-Neto, Nelson
Institution	Centro Brasileiro de Pesquisas FÃsicas - Rua das laranjeiras, 83, 1103 - Rio de Janeiro - Rio de Janeiro - Brazil

Session	CM3	Accepted		Order	Time
Talk	Oral abstract	Title	Bouncing Models and the Cosmological Constant
Co-authors
Abstract	Most bouncing models contain a contracting phase from a very large and rarefied state, where dark energy might have had an important role as it has today in accelerating our large Universe. In this talk, we will assume the simplest and most appealing candidate for dark energy, the cosmological constant, and evaluate its influence on the evolution of cosmological perturbations during the contracting phase of a bouncing model, which also contains a scalar field satisfying $p=w\epsilon$, $w$ being a constant. An almost scale invariant spectrum of perturbations is obtained for $w\approx 0$, which is the usual result for bouncing models. However, the presence of the cosmological constant induces oscillations and a running towards a tiny red-tilted spectrum for long wavelength perturbations.

Session	CM3	Accepted		Order	Time
Talk	Oral abstract	Title	Revision talk on bouncing models
Co-authors
Abstract