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Cosmological perfect fluids in Gauss-Bonnet gravity

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arxiv 1906.05693 v2 pith:T7ODWESV submitted 2019-06-13 gr-qc astro-ph.COhep-th

classification gr-qcastro-ph.COhep-th
keywords cosmologicalgauss-bonnetgravityanalyticalassociatedcomponentscurvaturedark
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abstract

In an $n$-dimensional Friedmann-Robertson-Walker metric, it is rigorously shown that any analytical theory of gravity $f(R,{\cal G})$, where $R$ is the curvature scalar and $\cal G$ is the Gauss-Bonnet topological invariant, can be associated to a perfect-fluid stress-energy tensor. In this perspective, dark components of the cosmological Hubble flow can be geometrically interpreted.

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Cited by 2 Pith papers

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

  1. From Quantum Correlations to Inflationary Tracking Scalar Field Evolution

    gr-qc 2026-08 reject novelty 4.0 of 10

    The author argues, via condensed-matter-style analogies, that the inflationary tracking condition emerges when the correlation length of primordial quantum degrees of freedom scales as a power of the Hubble radius.

  2. Generalized Misner-Sharp energy in $f(R,\mathcal{G})$ gravity

    gr-qc 2025-06 conditional novelty 4.0 of 10

    This paper extends the Misner-Sharp quasilocal energy to f(R,G) gravity and applies it to apparent horizon thermodynamics, finding a phase transition in the adiabatic index for certain models.

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