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Dynamics of dark energy with a coupling to dark matter
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Dark energy and dark matter are the dominant sources in the evolution of the late universe. They are currently only indirectly detected via their gravitational effects, and there could be a coupling between them without violating observational constraints. We investigate the background dynamics when dark energy is modelled as exponential quintessence, and is coupled to dark matter via simple models of energy exchange. We introduce a new form of dark sector coupling, which leads to a more complicated dynamical phase space and has a better physical motivation than previous mathematically similar couplings.
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Cited by 13 Pith papers
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Accelerating scaling solutions from dark matter particle creation
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Three nonlinear interacting dark energy models with a saturation ('sparseness') scale are constrained against late-time cosmological data, showing mild preference for nonzero sparseness but no decisive improvement over ΛCDM.
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Extended Effective Field Theory of Dark Energy: Ghost Condensate Dark Energy with Sextic Dispersion Relation in de Sitter Spacetime
A sextic ghost condensate dark energy model is shown to produce a matter-density-dependent correction to the Newtonian potential and a frequency-dependent gravitational wave speed in de Sitter spacetime.
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Interacting phantom dark energy: new accelerating scaling attractors
Interacting phantom dark energy with two previously underused potentials admits new stable late-time accelerating solutions in which dark matter and dark energy coexist.
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Fractional Dark Matter decay: cosmological imprints and observational constraints
Cosmological data limit a pre-recombination decaying dark matter fraction to at most about 2.7%, and future kSZ measurements could provide an independent test.
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Probing the independence within the dark sector in the fluid approximation
Current cosmological data show no statistically significant sign of an interaction between cold dark matter and dark energy, with LambdaCDM preferred, and future LSST and DESI data could constrain such a coupling at 2...
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The Status of Single Scalar Field Dark Energy
Cosmological data can constrain only a handful of EFT parameters for single-scalar dark energy; extended models show modest preference over Λ but remain underdetermined and challenged by fifth forces and screening.
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Classical and Loop Quantum Cosmology of Interacting Dark Energy: A Dynamical System Analysis with Superfluid Dark Matter and Dust Matter
Dynamical systems analysis shows loop quantum cosmology removes stable attractors in interacting dark energy-dark matter models that exist under classical gravity.
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Neutrino mass constraints in interacting dark energy models after DESI DR2
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 ...
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Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints
An interacting quintessence model with initial conditions set by the CMB sound horizon angle increases H0 with coupling strength, but observational constraints show it does not resolve the H0 or S8 tensions.
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Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy
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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Dark Energy in the DESI Era: A Brief Review of Evidence, Beyond-$\Lambda$CDM Interpretations, and Tensions
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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Bouncing Cosmology in Interacting Scalar-Torsion Gravity
Two interacting scalar-torsion models are shown, by tuned numerical construction, to host a matter bounce with phantom equation of state and NEC violation at the bounce epoch.
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