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Two-field Warm Inflation and Its Scalar Perturbations on Large Scales

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arxiv 1803.10066 v1 pith:X5ENE4FP submitted 2018-03-27 gr-qc

Two-field Warm Inflation and Its Scalar Perturbations on Large Scales

classification gr-qc
keywords inflationperturbationsgivescalarwarmadiabaticbackgrounddriven
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We explore the homogeneous background dynamics and the evolution of generated perturbations of cosmological inflation that is driven by multiple scalar fields interacting with a perfect fluid.Then we apply the method to warm inflation driven by two scalar fields and a radiation fluid, and present general results about the evolution of the inflaton and radiation. After decomposing the perturbations into adiabatic and entropy modes, we give the equation of motion of adiabatic and entropy perturbations on large scales. Then, we give numerical results of background and perturbation equations in a concrete model (the dissipative coefficient $\Gamma \propto H$). At last, we use the most recent observational data to constrain our models and give the observationally allowed regions of parameters. This work is a natural extension of warm inflation to multi-field cases.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Heterotic Warm Inflation

    hep-th 2025-09 conditional novelty 7.0

    In a heterotic-string-inspired two-field warm inflation model, the axion drives inflation while thermal corrections from gauge fields block sustained dilaton-driven inflation.