  We provide a cosmological implementation of the evolutionary quantum gravity,
describing an isotropic Universe, in the presence of a negative cosmological
constant and a massive (preinflationary) scalar field. We demonstrate that the
considered Universe has a nonsingular quantum behavior, associated to a
primordial bounce, whose ground state has a high occupation number.
Furthermore, in such a vacuum state, the super-Hamiltonian eigenvalue is
negative, corresponding to a positive emerging dust energy density. The
regularization of the model is performed via a polymer quantum approach to the
Universe scale factor and the proper classical limit is then recovered, in
agreement with a preinflationary state of the Universe. Since the dust energy
density is redshifted by the Universe deSitter phase and the cosmological
constant does not enter the ground state eigenvalue, we get a late-time
cosmology, compatible with the present observations, endowed with a turning
point in the far future.
