Multi-field inflation: Formulation, effective theory and phenomenology

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Article number012057
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 2014
Event7th International Conference on Gravitation and Cosmology, ICGC 2011 - Goa, India
Duration: 14 Dec 201119 Dec 2011


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