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Minimal warm inflation with complete medium response

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arxiv 2102.09913 v2 pith:STDBBQ7E submitted 2021-02-19 hep-ph astro-ph.CO

classification hep-phastro-ph.CO
keywords mediuminflationwarmevolutionfieldlatterscalestemperature
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If a homogeneous field evolves within a medium, with the latter gradually picking up a temperature, then the friction felt by the field depends on how its evolution rate compares with medium time scales. We suggest a framework which permits to incorporate the contributions from all medium time scales. As an example, we illustrate how warm axion inflation can be described by inputting the retarded pseudoscalar correlator of a thermal Yang-Mills plasma. Adopting a semi-realistic model for the latter, and starting the evolution at almost vanishing temperature, we show how the system heats up and then enters the "weak" or "strong" regime of warm inflation. Previous approximate treatments are scrutinized.

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Cited by 3 Pith papers

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

  1. Heterotic Warm Inflation

    hep-th 2025-09 conditional novelty 7.0 of 10

    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.

  2. Axion Inflation with a Massive Abelian Gauge Field

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    A massive Abelian gauge field axially coupled to the inflaton yields tachyonic production only for |ξ|>m/H, with sourced CMB curvature power suppressed as ~1/m̄²–1/m̄³ at fixed backreaction, allowing strong friction f...

  3. CMB constraints on $U(1)$ axion warm inflation

    astro-ph.CO 2025-07 conditional novelty 4.0 of 10

    Axion-driven warm inflation with U(1) gauge fields is constrained with CMB data and remains viable for sub-Planckian decay constants, but requires large Chern-Simons couplings.

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