Perturbações cosmológicas de origens quântica e clássica : oscilações no espectro de potência e o condensado de Bose-Einstein

Abstract

The relativistic perturbations of quantum origin are the “seeds” that evolved into the large scale structures throughout classical gravitational instabilities. We study the gauge invariant formalism for the cosmological perturbations and we apply into a two fields model, where one of them suffers a gain of mass, that causes a sharp turn in the fields trajectory, resulting in oscillations of the primordial power spectrum with amplitudes bounded by the observational data. We also study the structure formation within a dark matter model, where dark matter particles are described by a Bose-Einstein condensate