Non-minimal dark sector physics and cosmological tensions

Abstract

We explore whether non-standard dark sector physics might be required to solve the existing cosmological tensions. The properties we consider in combination are an interaction between the dark matter and dark energy components, and a dark energy equation of state $w$ different from that of the canonical cosmological constant $w=-1$. In principle, these two parameters are independent. In practice, to avoid early-time, superhorizon instabilities, their allowed parameter spaces are correlated. We analyze three classes of extended interacting dark energy models in light of the 2019 Planck CMB results and Cepheid-calibrated local distance ladder $H_0$ measurements of Riess et al. (R19), as well as recent BAO and SNeIa distance data. We find that in quintessence coupled dark energy models, where $w>-1$, the evidence for a non-zero coupling between the two dark sectors can surpass the $5\sigma$ significance. On the other hand, in phantom coupled dark energy models, there is no such preference for a non-zero dark sector coupling. All the models we consider significantly raise the value of the Hubble constant easing the $H_0$ tension. The addition of low-redshift BAO and SNeIa measurements leaves some residual tension with R19 but at a level that could be justified by a statistical fluctuation. Bayesian evidence considerations mildly disfavour both the coupled quintessence and phantom models, while mildly favouring a coupled vacuum scenario, even when late-time datasets are considered. We conclude that non-minimal dark energy cosmologies, such as coupled quintessence, phantom, or vacuum models, are still an interesting route towards softening existing cosmological tensions, even when low-redshift datasets and Bayesian evidence considerations are taken into account. (abstract severely abridged)

arXiv comment19 pages, 5 figures, added Bayesian evidence computation and further discussions. Version accepted for publication in PRD

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• Conformally and Disformally Coupled Vector field Models of Dark Energy
• A visual tool for assessing tension-resolving models in the $H_0$-${\sigma }_8$ plane
• CMB lensing in a modified $\Lambda$CDM model in light of the $H_0$ tension
• Towards a Solution to the H0 Tension: the Price to Pay
• Testing the growth rate in homogeneous and inhomogeneous interacting vacuum models
• Linear matter density perturbations in the ${\Lambda }_{\mathrm{s}}$CDM model: Examining growth dynamics and addressing the $S_8$ tension
• Global 21-cm brightness temperature in viscous dark energy models
• Observational constraints on interactions between dark energy and dark matter with momentum and energy transfers
• Evolution of superclusters and supercluster cocoons in various cosmologies
• Quantum Discrete Levels of the Universe from the Early Trans-Planckian Vacuum to the Late Dark Energy
• Post-reionization HI 21-cm signal: A probe of negative cosmological constant
• A model of dark matter dark energy interaction with some cosmic consequences
• Evidence of dark energy in different cosmological observations
• Interacting phantom dark energy: new accelerating scaling attractors
• A study of interacting scalar field model from the perspective of the dynamical systems theory
• Interacting dark sector: a dynamical system perspective
• Possible Resolution of the Hubble Tension with Weyl Invariant Gravity
• Gravitational waves from inspiraling black holes in quadratic gravity
• Hubble tension as a window on the gravitation of the dark matter sector: Exploration of a family of models
• ${\Lambda }_{\mathrm{s}}$CDM cosmology from a type-II minimally modified gravity
• Forecasts for interacting dark energy with time-dependent momentum exchange
• Model-Independent Perspectives on Coupled Dark Energy and the Swampland
• The Logotropic Dark Fluid: Observational and Thermodynamic Constraints
• $\Lambda$CDM as a Noether Symmetry in Cosmology
• Bayesian Comparison of Interacting Modified Holographic Ricci Dark Energy Scenarios
• Extended Uncertainty Principle: A Deeper Insight into the Hubble Tension?
• Addressing the Hubble tension in Yukawa cosmology?
• An approach to cold dark matter deviation and the $H_0$ tension problem by using machine learning
• I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Implications for cosmology from Ground-based Cosmic Microwave Background observations
• Coupled scalar field cosmology with effects of curvature
• Late-time Background Constraints on Linear and Non-linear Interacting Dark Energy after DESI DR2
• Is there evidence for CIDER in the Universe?
• Revisiting holographic dark energy from the perspective of multi-messenger gravitational wave astronomy: future joint observations with short gamma-ray bursts
• Dark Gravitational Field on Riemannian and Sasaki Spacetime
• Interplay between Swampland and Bayesian Machine Learning in constraining cosmological models
• Hubble Hullabaloo and String Cosmology
• Anisotropic Conformal Dark Gravity on the Lorentz Tangent Bundle Spacetime
• Effects of particle creation rate in two-fluid interacting cosmologies
• Interacting Dark Energy: New parametrization and observational constraints
• Dark energy-dark matter interactions as a solution to the $S_8$ tension
• Cosmological Dynamics in Interacting Scalar-Torsion f(T,$\varphi$) Gravity: Investigating Energy and Momentum Couplings
• A new way to test the WIMP dark matter models
• Prospects of probing dark energy with eLISA: Standard versus null diagnostics
• Another look on the connections of Hubble tension with the Heisenberg Uncertainty Principle
• Hint of dark matter-dark energy interaction in DESI DR2 and current cosmological dataset?
• Multi-messenger standard-siren cosmology for third-generation gravitational-wave detectors: forecasts considering observations of gamma-ray bursts and kilonovae
• Dynamical systems analysis of a cosmological model with interacting Umami Chaplygin fluid in adiabatic particle creation mechanism: Some bouncing features
• Generalized Holographic Cosmology: low-redshift observational constraint
• Equivalence of Dark Energy Models: A Theoretical and Bayesian Perspective
• Interacting dark sector with quadratic coupling: theoretical and observational viability
• Vacuum Energy and Renormalization of the Field-Independent Term
• Unified Dark Energy and Dark Matter from Dynamical Spacetime Cosmology
• Vainshtein screening in Horndeski theories nonminimally and kinetically coupled to ordinary matter
• Dark energy model with very large-scale inhomogeneity
• Is Dark Energy Changing? Probing the Universe's Expansion with present and future astronomical probes
• Cosmological models, observational data and tension in Hubble constant
• Interacting Dark Energy and Its Implications for Unified Dark Sector
• Particle Production Scenario in an Algebraically Coupled Quintessence Field with a Dark Matter Fluid
• Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints
• The frozen vanilla model: Exploring dark sector interactions with delta effective theories
• Dissecting the $H_0$ and $S_8$ tensions with Planck + BAO + supernova type Ia in multi-parameter cosmologies
• Dark sector interactions in the $w\to -1$ limit: velocity locking in pure momentum exchange models
• Momentum transfer models of interacting dark energy
• Probing the Type 3 interacting dark-energy model using matter pairwise velocity
• Galactic model with a phase transition from dark matter to dark energy
• A comprehensive dynamical and phenomenological analysis of structure growth in curvature-modulated coupled quintessence scenario
• Quintessence and false vacuum: Two sides of the same coin?
• Exploration of the high-redshift universe enabled by THESEUS
• Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures
• Holographic Ricci DE as running vacuum with nonlinear interactions
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Qualitative probe of interacting dark energy with redshift-space distortions
• Refitting cosmological data with neutrino mass and degeneracy
• Phantom cosmology with arbitrary potential: New accelerating scaling attractors
• A study of potential non-relativistic QED pairs in the Keldysh-Schwinger formalism
• Constraints on polynomial inflation under power-law perturbations
• Self-interaction in a cosmic dark fluid: The four-kernel rheological extension of the equations of state
• Modifying $\Lambda$CDM dynamics via out-of-equilibrium axions: reconciling SH0ES and DESI $H_0$ values
• Background-level reconstruction of scalar-field potentials from dark-energy histories and comparison with analytic potential families
• Background dynamics and observational constraints of flat and non-flat $\Lambda (t)$CDM models from $H(z)$ and DESI DR2 BAO measurements
• Dark photon searches via Higgs boson production at the LHC and beyond
• On the road to percent accuracy VI: the nonlinear power spectrum for interacting dark energy with baryonic feedback and massive neutrinos
• Revisiting dynamics of interacting quintessence