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arXiv · 1905.02414

Observational Constraints on Two-field Warm Inflation

Yang-yang Wang·Xiao-Min Zhang·Jian-Yang Zhu
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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.

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Yang-yang Wang, Xiao-Min Zhang, Jian-Yang Zhu. 2019-05-07. Observational Constraints on Two-field Warm Inflation. https://doi.org/10.1103/physrevd.99.103529

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