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Dynamical stability in models where dark matter and dark energy are non-minimally coupled to curvature

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arxiv 2305.19062 v2 pith:ZOCTUPXN submitted 2023-05-30 gr-qc hep-th

classification gr-qchep-th
keywords darkcurvaturemattercoupledenergyacceleratingcasedynamical
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This work explores the dynamical stability of cosmological models where dark matter and dark energy can non-minimally couple to spacetime (scalar) curvature. Two different scenarios are presented here. In the initial case, only dark matter sector is coupled to curvature in the presence of a quintessence scalar field. In the second case both dark matter and the quintessence field are coupled to curvature. It is shown that one can get an accelerating expansion phase of the universe in both the cases. The nature of the fixed points show that there can be stable or unstable phases where the curvature coupling vanishes and dark energy and dark matter evolve independently. On the other hand there can be stable accelerating expansion phases where both the components are coupled to curvature.

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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. Understanding curvature-matter interaction in viable $f(R)$ dark energy models: A dynamical analysis approach

    gr-qc 2024-12 reject novelty 5.0 of 10

    In two f(R) gravity models, a specific matter-curvature interaction shifts the fixed points and can create stable late-time accelerating attractors, but the attractors appear only for parameter values outside the mode...

  2. Observational and Thermodynamic aspects of one-dimensional Dark Energy EoS parametrization models

    gr-qc 2026-03 conditional novelty 4.0 of 10

    Gong–Zhang Type I/II dark-energy parametrizations remain competitive with ΛCDM under late-time probes, with GZ2 preferred and configuration entropy sensitive to late-time clustering.

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