Primordial scalar power spectrum from the Euclidean Big Bounce
  In effective models of loop quantum cosmology, the holonomy corrections are
associated with deformations of space-time symmetries. The most evident
manifestation of the deformations is the emergence of an Euclidean phase
accompanying the non-singular bouncing dynamics of the scale factor. In this
article, we compute the power spectrum of scalar perturbations generated in
this model, with a massive scalar field as the matter content. Instantaneous
and adiabatic vacuum-type initial conditions for scalar perturbations are
imposed in the contracting phase. The evolution through the Euclidean region is
calculated based on the extrapolation of the time direction pointed by the
vectors normal to the Cauchy hypersurface in the Lorentzian domains. The
obtained power spectrum is characterized by a suppression in the IR regime and
oscillations in the intermediate energy range. Furthermore, the speculative
extension of the analysis in the UV reveals a specific rise of the power.
