134 citations · 284 across the 6 of their papers we have counts for
12 papers · 1 filter
Large classical universes emerging from quantum cosmology
Nelson Pinto-Neto
It is generally believed that one cannot obtain a large Universe from quantum cosmological models without an inflationary phase in the classical expanding era because the typical s…
Scalar Perturbations in Scalar Field Quantum Cosmology
F. T. Falciano, N. Pinto-Neto
In this paper it is shown how to obtain the simplest equations for the Mukhanov-Sasaki variables describing quantum linear scalar perturbations in the case of scalar fields without…
Cosmology without inflation
Patrick Peter, Nelson Pinto-Neto
We propose a new cosmological paradigm in which our observed expanding phase is originated from an initially large contracting Universe that subsequently experienced a bounce. This…
Cosmic acceleration from interaction of ordinary fluids
Nelson Pinto-Neto, Bernardo M. O. Fraga
Cosmological models with two interacting fluids, each satisfying the strong energy condition, are studied in the framework of classical General Relativity. If the interactions are…
Spectra of primordial fluctuations in two-perfect-fluid regular bounces
F. Finelli, P. Peter, N. Pinto-Neto
We introduce analytic solutions for a class of two components bouncing models, where the bounce is triggered by a negative energy density perfect fluid. The equation of state of th…
An Inflationary Non-singular Quantum Cosmological Model
Felipe T. Falciano, Nelson Pinto-Neto, E. Sergio Santini
A stiff matter-dominated universe modeled by a free massless scalar field minimally coupled to gravity in a Friedmann-Lema\^ıtre-Robertson-Walker (FLRW) geometry is quantized. Gene…