Large Local Non-Gaussianity from General Single-field Inflation
High Energy Physics - Theory
2015-06-15 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We investigate the non-Gaussian signatures of ultra slow-roll inflation. The bispectrum and the trispectrum are calculated with general initial conditions. The trispectrum is of local shape, as in the case of the bispectrum. We show that the prediction of local non-Gaussianity is robust again generalizing the Bunch-Davies vacuum. The Suyama-Yamaguchi relation is saturated in this scenario.
Keywords
Cite
@article{arxiv.1303.4526,
title = {Large Local Non-Gaussianity from General Single-field Inflation},
author = {Qing-Guo Huang and Yi Wang},
journal= {arXiv preprint arXiv:1303.4526},
year = {2015}
}
Comments
5 pages, one figure