Inflationary Imprints on the Large Scale Structure of the Universe

Inflation is the predominant model describing the early universe, however we do not know much about the underlying theory, besides, there are other open questions in cosmology, for example about the nature of dark matter and dark energy. Clues must come from the observational side and LSS surveys such as Euclid are planned for this. This work will consider forecasts on the performance of Euclid in measuring some cosmological parameters from the LSS of the universe. Keeping in mind the limitations of a fully PT approach we will limit ourselves to analytical results. We will focus on the CR of the LSS and by using the Fisher matrix approach we will examine the possibility of measuring the bias parameter using the CR from the Power Spectrum and the Bispectrum. Moreover we will perform 2-D forecasts on parameters that are present in a PS which displays, besides BAO's, further oscillations of inflationary origin.