Particles and gravitons creation after inflation from a 5D vacuum

MARIANO ANABITARTE; MAURICIO BELLINI

European Physical Journal Plus

Springer

Lugar: Bologna; Año: 2011 vol. 126 p. 90 - 112

2190-5444

We use the Bogoliubov formalism to study both particles and gravitons creation at the reheating epoch, after a phase transition from inflation to a radiation-dominated universe. The modes of the inflaton field fluctuations and the scalar fluctuations of the metric at the end of inflation are obtained by using a recently introduced formalism related to the Induced Matter theory of gravity. The interesting result is that the number of created particles is bigger than 10^(90) on cosmological scales. Furthermore, the number of gravitons are nearly 10^(−17) times smaller than the number of created particles. In both cases, these numbers rapidly increase on cosmological scales.90) on cosmological scales. Furthermore, the number of gravitons are nearly 10^(−17) times smaller than the number of created particles. In both cases, these numbers rapidly increase on cosmological scales.