We have described how to obtain the non-perturbative low energy effective field theory of single field inflation from a generic multi-field model by integrating out heavy fields. The features of heavy physics is described by the effective speed of sound, which leaves distinctive observational signatures in the correlation functions of the curvature perturbation.
|Journal||Journal of Physics: Conference Series|
|State||Published - 2014|
|Event||7th International Conference on Gravitation and Cosmology, ICGC 2011 - Goa, India|
Duration: 14 Dec 2011 → 19 Dec 2011