English

Non-Gaussianity in a general kind noncanonical warm inflation

General Relativity and Quantum Cosmology 2019-12-19 v2 Cosmology and Nongalactic Astrophysics

Abstract

The general kind noncanonical warm inflation is introduced and its total non-Gaussianity of perturbation on uniform energy density hypersurfaces is studied. The total non-Gaussianity contains two complementary parts: the three- and the four-point correlations. The three-point correlation part denoted by fNLintf^{int}_{NL}, comes from the three-point correlation of inflaton field, while the four-point correlation part, denoted by fNLδNf_{NL}^{\delta N}, is the contribution due to the four-point correlation function of the inflaton field. The aforementioned two parts of non-Gaussianity in general noncanonical warm inflation are calculated and analysed respectively, and the comparisons and discussions of the two parts are finally carried out in this study.

Keywords

Cite

@article{arxiv.1910.01390,
  title  = {Non-Gaussianity in a general kind noncanonical warm inflation},
  author = {Xiao-Min Zhang and Kai Li and Hong-Yang Ma and Qian Liu and Jian-Yang Zhu},
  journal= {arXiv preprint arXiv:1910.01390},
  year   = {2019}
}

Comments

8pages,0figures