Orateur
Description
We have recently proposed a new model-independent mechanism for producing primordial black holes from a period of multi-field inflation. The desired enhancement of primordial fluctuations at short scales naturally occurs when the inflationary trajectory exhibits a strong turn, that is a limited period during which the trajectory strongly deviates from a geodesic in field space. The mechanism, independently of being able to account for all or a fraction of dark matter in the form of primordial black holes, has the potential of exhibiting unique features accessible to observation through a stochastic background of gravitational waves. The peculiar features in the induced gravitational waves spectrum, such as characteristic peaks and oscillating patterns, offers the possibility to link the microscopic dynamics of inflation with the gravitational waves energy density potentially detectable by LISA.
