Séminaire / Seminar GReCO |
| « DBI inflation coupled to matter » |
|
E. Cluzel |
| We consider k-inflation models such as DBI inflation where the action is a non-linear function of both the inflaton and the inflaton kinetic term. After a brief review, we focus on a scalar-tensor extension of k-inflation coupled to matter for which we derive a modified Mukhanov-Sasaki equation for the curvature perturbation. Significant corrections to the power spectrum appear when the coupling function changes abruptly along the inflationary trajectory. |
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jeudi 26 mai 2011 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |