Matter Creation in Generalized Galilean Genesis

摘要

The galilean genesis is known as an alternative to inflation in which the universe starts from Minkowski space-time. We consider the scenario that the phase of universe changes to kination dominant phase from Genesis phase, and we study the matter creation during this phase transition. The temperature at the transition corresponds to the reheating temperature in the inflation scenario. As a result, we obtain the energy density of the created matter and the reheating temperature. Furthermore, this result gives us the shape of the spectrum of the gravitational waves.