Multi-field inflation: Formulation, effective theory and phenomenology

7th International Conference on Gravitation and Cosmology

Gong, J.-O.^1

Theory Division, CERN, CH-1211 Genève 23, Switzerland^1

关键词: Correlation function;    Effective field theory;    Effective theories;    Low-energy;    Multi-field;    Multi-field model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/484/1/012057/pdf
DOI  :  10.1088/1742-6596/484/1/012057

来源: IOP

【 摘 要 】

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.