Non-Gaussianity of quantum fields during inflation

Kazuya Koyama (1)

1 Institute of Cosmology & Gravitation

In this review, we discuss how non-Gaussianity of cosmological perturbations arises from inflation. After introducing the in-in formalism to calculate the n-point correlation function of quantum fields, we present the computation of the bispectrum of the curvature perturbation generated in general single field inflation models. The shapes of the bispectrum are compared with the local-type non-Gaussianity that arises from non-linear dynamics on super-horizon scales.

Mots clés: Physical Sciences

Kazuya Koyama. Non-Gaussianity of quantum fields during inflation. Classical and Quantum Gravity, 2010, 27 (12), pp.124001. ⟨10.1088/0264-9381/27/12/124001⟩. ⟨hal-00601889⟩