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Probing the interaction between dark energy and dark matter with the parametrized post-Friedmann approach

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arxiv 1702.04564 v3 pith:FV7SNBPK submitted 2017-02-15 astro-ph.CO gr-qchep-phhep-th

classification astro-ph.COgr-qchep-phhep-th
keywords darkenergydatamatterobservationalscenarioapproachcosmology
verification ladder T0 review T1 audit T2 compute T3 formal

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There possibly exists some direct, non-gravitational coupling between dark energy and dark matter. This possibility should be seriously tested by using observations, which requires us to understand such a scenario from the aspects of both expansion history and growth of structure. It is found that once calculating the perturbations in the interacting dark energy (IDE) scenario, for most cases the curvature perturbation on superhorizon scales is divergent, which is a catastrophe for the IDE cosmology. We found a solution to this issue, which is to establish an effective theory to treat the dark energy perturbations totally based on the basic facts of dark energy. This scheme generalizes the parametrized post-Friedmann framework of uncoupled dark energy and can be used to cure the instability of the IDE cosmology. The whole parameter space of IDE models can henceforward be explored by observational data. The IDE scenario can thus be tested or falsified with current and future observational data by using the PPF approach. We expect that the future highly accurate observational data would offer the certain answer to the question whether there is a direct coupling between dark energy and dark matter.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 48 citations worldwide. Full citation record

  1. 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.

  2. Neutrino mass constraints in interacting dark energy models after DESI DR2

    astro-ph.CO 2026-06 unverdicted novelty 4.0 of 10

    Upper bounds on total neutrino mass in four phenomenological interacting dark energy models are derived from DESI DR2 BAO plus CMB and SNIa data, showing strong dependence on the interaction term form and statistical ...

  3. 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...

  4. Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Review of DESI evidence for dynamical dark energy, its dependence on parametrization and datasets, and alternative beyond-LambdaCDM interpretations that may address cosmological tensions.

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