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arxiv: 2210.15348 · v1 · pith:OD2PX7P2new · submitted 2022-10-27 · 🌀 gr-qc

Past-directed scalar field gradients and scalar-tensor thermodynamics

Andrea Giusti , Serena Giardino , Valerio Faraoni This is my paper
classification 🌀 gr-qc
keywords scalar-tensorthermodynamicsfirst-ordergradientspast-directedscalararisingcosmological
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We refine and slightly enlarge the recently proposed first-order thermodynamics of scalar-tensor gravity to include gravitational scalar fields with timelike and past-directed gradients. The implications and subtleties arising in this situation are discussed and an exact cosmological solution of scalar-tensor theory in first-order thermodynamics is revisited in light of these results.

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

  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.