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Covariantizing the interaction between dark energy and dark matter

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arxiv 1405.7288 v2 pith:3WTAN3WI submitted 2014-05-28 gr-qc

classification gr-qc
keywords darkeffectiveenergyfluidfluidsformulationimperfectnessinteracting
verification ladder T0 review T1 audit T2 compute T3 formal
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Coupling dark energy and dark matter through an effective fluid description is a very common procedure in cosmology, however it always remains in comoving coordinates in the special FLRW space. We construct a consistent, general, and covariant formulation, where the interaction is a natural implication of the imperfectness of the fluids. This imperfectness makes difficult the final step towards a robust formulation of interacting fluids, namely the construction of a Lagrangian whose variation would give rise to the interacting equations. Nevertheless, we present a formal solution to this problem for a single fluid, through the introduction of an effective metric.

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Forward citations

Cited by 4 Pith papers

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

  1. Accelerating scaling solutions from dark matter particle creation

    gr-qc 2026-04 unverdicted novelty 5.0 of 10

    Accelerating scaling attractors without dark energy appear only when the interaction is controlled by DM density and energy flows from DM to a barotropic fluid.

  2. Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions

    astro-ph.CO 2019-08 conditional novelty 5.0 of 10

    An interacting dark energy model with coupling proportional to the dark energy density alleviates the H0 and S8 tensions in Planck 2018 data but is not preferred once BAO and supernova data are included.

  3. The model-independent degeneracy-breaking point in cosmological models with interacting Dark Energy and Dark Matter

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    In interacting dark energy models, the interaction term becomes independent of the constant dark energy equation of state at a specific redshift (about z=1.4), giving a point where the interaction can be observed with...

  4. Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    Adding 1000 simulated Einstein Telescope standard sirens to current CMB, BAO, and supernova data would tighten H0 and matter density constraints by factors of 2 to 3 in four interacting dark energy models, with modest...

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