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Observational Constraints on Two-field Warm Inflation

Authors :
Wang, Yang-yang
Zhang, Xiao-Min
Zhu, Jian-Yang
Source :
Phys. Rev. D 99, 103529(2019)
Publication Year :
2019

Abstract

We study the two-field warm inflation models with a double quadratic potential and a linear temperature dependent dissipative coefficient. We derived the evolution equation of all kinds of perturbations without assuming slow-roll approximation, and obtained the curvature power spectrum at the end of inflation with a fully numerical method. Then we compute the scalar spectral index $n_s$, tensor-to-scalar ratio $r$ for several representative potentials, and compare our results with observational data. At last, we use Planck data to constrain the parameters in our models. This work is a natural extension of single-field warm inflation, and the aim of this work is to present some features of multi-field warm inflation using a simple two-field model.<br />Comment: 13 pages, 6 figures. Accepted for publication in Physical Review D

Details

Database :
arXiv
Journal :
Phys. Rev. D 99, 103529(2019)
Publication Type :
Report
Accession number :
edsarx.1905.02414
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.99.103529