Speaker
Mr
Das Kumar
(SINP)
Description
We have constructed a large field N-flation model in the Supergravity framework.
In this simple set-up, N fields collectively drive inflation where each field traverses
sub-Planckian field values. This has been realised with a generalisation of the single
field chaotic inflation in Supergravity. Interestingly,despite of the presence of the field
interactions, the dynamics can be described in terms of an effective single field. With
the help of a simple example we have explicitly showed how a two field dynamics is
effectively reduced to a single field. Then we extended our argument for N fields.The
observable predictions of our model i.e. tensor to scalar ratio r and scalar spectral
index ns are close to the chaotic inflationary model with quadratic potential
Author
Mr
Das Kumar
(SINP)
