103 citations · 236 across the 3 of their papers we have counts for
3 papers
A non inflationary model with scale invariant cosmological perturbations
Patrick Peter, E. J. C. Pinho, Nelson Pinto-Neto
We show that a contracting universe which bounces due to quantum cosmological effects and connects to the hot big-bang expansion phase, can produce an almost scale invariant spectr…
Scalar and Vector Perturbations in Quantum Cosmological Backgrounds
Emanuel J. C. Pinho, Nelson Pinto-Neto
Generalizing a previous work concerning cosmological linear tensor perturbations, we show that the lagrangians and hamiltonians of cosmological linear scalar and vector perturbatio…
Gravitational wave background in perfect fluid quantum cosmologies
Patrick Peter, Emanuel J. C. Pinho, Nelson Pinto-Neto
We discuss the gravitational wave background produced by bouncing models based on a full quantum evolution of a universe filled with a perfect fluid. Using an ontological interpret…