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Cosmological Hyperfluids, Torsion and Non-metricity

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arxiv 2003.07384 v1 pith:OK272SWI submitted 2020-03-16 gr-qc hep-phhep-th

Damianos Iosifidis This is my paper · ORCID
classification gr-qchep-phhep-th
keywords cosmologicalmodelnon-metricitytorsionhypermomentumconservationformgeneral
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We develop a novel model for Cosmological Hyperfluids, that is fluids with intrinsic hypermomentum that induce spacetime torsion and non-metricity. Imposing the Cosmological Principle to Metric-Affine Spaces, we present the most general covariant form of the hypermomentum tensor in an FLRW Universe along with its conservation laws and therefore construct a novel hyperfluid model for Cosmological purposes. Extending the previous model of the unconstrained hyperfluid in a Cosmological setting we establish the conservation laws for energy-momentum and hypermomentum and therefore provide the complete Cosmological setup to study non-Riemannian effects in Cosmology. With the help of this we find the forms of torsion and non-metricity that were earlier reported in the literature and also obtain the most general form of the Friedmann equations with torsion and non-metricity. We also discuss some applications of our model, make contact with the known results in the literature and point to future directions.

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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. Jacobson's thermodynamic approach to classical gravity applied to non-Riemannian geometries: remarks on the simplicity of Nature

    gr-qc 2026-01 unverdicted novelty 7.0 of 10

    Jacobson's thermodynamic approach applied to non-Riemannian geometries selects the Einstein-Hilbert action plus a quadratic torsion term as Nature's choice when non-metricity is absent and the metric energy-momentum t...

  2. Geometric formulation of $k$-essence and late-time acceleration

    gr-qc 2025-05 conditional novelty 6.0 of 10

    Integrable vectorial nonmetricity gravity is shown to be equivalent to purely kinetic quadratic k-essence, which fits late-time data as well as ΛCDM.

  3. Friedmann cosmology with hyperfluids of constant equation of state

    gr-qc 2025-08 unverdicted novelty 4.0 of 10

    In metric-affine gravity with hyperfluids of constant equation of state, Friedmann evolution is modified by hypermomentum and depends on the constants linking hypermomentum to matter density.

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