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arxiv: astro-ph/0005352 · v1 · pith:WAFVZBH6new · submitted 2000-05-17 · 🌌 astro-ph · gr-qc

Cosmological two-fluid thermodynamics

Winfried Zimdahl (Konstanz) , Diego Pav\'on (Barcelona) This is my paper
classification 🌌 astro-ph gr-qc
keywords cosmologicalannihilationaspectsbeginbehaviorblackdeflationarydifferent
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We reveal unifying thermodynamic aspects of so different phenomena as the cosmological electron-positron annihilation, the evaporation of primordial black holes with a narrow mass range, and the ``deflationary'' transition from an initial de Sitter phase to a subsequent standard Friedmann-Lema\^{\i}tre-Robertson-Walker begin (FLRW) behavior.

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  1. Eckart heat-flux applicability in $F(\Phi,X)R$ theories and the existence of temperature gradients

    gr-qc 2025-12 unverdicted novelty 7.0

    Eckart heat flux holds for all timelike scalar configurations in F(Φ,X)R + G theories if and only if F_X ≡ 0, reducing the theory to a Jordan-like subclass of Horndeski.