7-11 September 2015
Warsaw, Poland
Europe/Zurich timezone

Evolution of density perturbations in inflationary models with two scalar fields and with different sound speeds

8 Sep 2015, 12:45
Warsaw, Poland

Warsaw, Poland

University of Warsaw, 26/28 Krakowskie Przedmiescie Street in the building of the Old Library


Lukasz Dulny (Faculty of Physics, University of Warsaw, Poland)


Equations of motion in slow roll inflationary models with two scalar fields for scalar perturbations metrics were analysed for an example of turning valley in scalar potential with non-canonical kinetic term. The impact of the multi-scale dynamics on the sub-horizon evolution of the perturbations was studied with a special emphasis on the (lack of) decoupling of the large scale modes and features of the background evolution. Potential consequences for the interpretation of the Planck data were discussed.

Presentation Materials