Dark Interactions and Cosmological Fine-Tuning

Abstract

Cosmological models involving an interaction between dark matter and dark energy have been proposed in order to solve the so-called coincidence problem. Different forms of coupling have been studied, but there have been claims that observational data seem to narrow (some of) them down to something annoyingly close to the $\Lambda$CDM model, thus greatly reducing their ability to deal with the problem in the first place. The smallness problem of the initial energy density of dark energy has also been a target of cosmological models in recent years. Making use of a moderately general coupling scheme, this paper aims to unite these different approaches and shed some light as to whether this class of models has any true perspective in suppressing the aforementioned issues that plague our current understanding of the universe, in a quantitative and unambiguous way.

13 pages, 9 figures, accepted for publication in JCAP. Minor corrections, one figure replaced, references added

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Cited by in corpus (137)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Dynamical systems applied to cosmology: dark energy and modified gravity
• Large-scale instability in interacting dark energy and dark matter fluids
• Tale of stable interacting dark energy, observational signatures, and the $H_0$ tension
• Dynamics of interacting dark energy
• Cosmological Evolution With Interaction Between Dark Energy And Dark Matter
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• Linear and nonlinear interactions in the dark sector
• Dark coupling
• Stability of the curvature perturbation in dark sectors' mutual interacting models
• Observational constraints on an interacting dark energy model
• Interacting Dark Energy -- constraints and degeneracies
• Models of coupled dark matter to dark energy
• The Growth of Structure in Interacting Dark Energy Models
• Cosmological constraints on interacting dark energy with redshift-space distortion after Planck data
• Large-scale Stability and Astronomical Constraints for Coupled Dark-Energy Models
• Observational constraints on sign-changeable interaction models and alleviation of the $H_0$ tension
• Dynamical Systems Perspective of Cosmological Finite-time Singularities in $f(R)$ Gravity and Interacting Multifluid Cosmology
• Generalized hybrid metric-Palatini gravity
• The Parameterized Post-Friedmannian Framework for Interacting Dark Energy Theories
• Adiabatic initial conditions for perturbations in interacting dark energy models
• An analytic model for interacting dark energy and its observational constraints
• On the Dark Sector Interactions
• A new interacting two fluid model and its consequences
• Cosmological dynamics of mimetic gravity
• Dynamics of an Interacting Barrow Holographic Dark Energy Model and its Thermodynamic Implications
• On the large-scale instability in interacting dark energy and dark matter fluids
• Astronomical bounds on a cosmological model allowing a general interaction in the dark sector
• Novel approach towards the large-scale stable Interacting Dark-Energy models and their Astronomical Bounds
• Listening to the sound of dark sector interactions with gravitational wave standard sirens
• New Cosmic Accelerating Scenario without Dark Energy
• Large-scale stable interacting dark energy model: Cosmological perturbations and observational constraints
• A Field Theory Model for Dark Matter and Dark Energy in Interaction
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Viable Singularity-Free f(R) Gravity Without a Cosmological Constant
• Newtonian Perturbations on Models with Matter Creation
• Testing coupled dark energy with large scale structure observation
• Constraints on coupled dark energy using CMB data from WMAP and SPT
• Testing coupled dark energy models with their cosmological background evolution
• Observational constraints on holographic tachyonic dark energy in interaction with dark matter
• Effects of Anisotropic Stress in Interacting Dark Matter - Dark Energy Scenarios
• Irreversible thermodynamic description of interacting dark energy - dark matter cosmological models
• Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
• Distinguishing Between Void Models and Dark Energy with Cosmic Parallax and Redshift Drift
• Cosmological Fluids with Logarithmic Equation of State
• Clarifying spherical collapse in coupled dark energy cosmologies
• Dynamics of dark energy models and centre manifolds
• Quintessence with quadratic coupling to dark matter
• Testing coupled dark energy with next-generation large-scale observations
• Can Dark Matter Decay in Dark Energy?
• Coupled dark energy with perturbed Hubble expansion rate
• Dynamics of nonlinear interacting dark energy models
• Cosmological consequences of a possible $\Lambda$-dark matter interaction
• Cosmological constraints on coupled dark energy
• Stability analysis of the Tsallis holographic dark energy model
• Dynamics and cosmological evolution in Λ-varying cosmology
• Late universe dynamics with scale-independent linear couplings in the dark sector
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Large-scale (in-) stability Analysis of an Exactly Solved Coupled Dark-Energy Model
• Transient cosmic acceleration from interacting fluids
• Cosmic accelerated expansion and the entropy corrected holographic dark energy
• $\Lambda (t)$ cosmology induced by a slowly varying Elko field
• A new approach on the stability analysis in ELKO cosmology
• New Interaction between Dark Energy and Dark Matter Changes Sign during Cosmological Evolution
• Interacting Cosmological Fluids and the Coincidence Problem
• Dynamically avoiding fine-tuning the cosmological constant: the "Relaxed Universe"
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Barrow holographic dark energy in the Brans-Dicke cosmology
• Phantom-Like Behavior in $f(R)$-Gravity
• Kaluza-Klein Cosmology With Modified Holographic Dark Energy
• Interacting viscous dark fluids
• Unified early and late Universe cosmology through dissipative effects in steep quintessential inflation potential models
• Relaxing a large cosmological constant
• A Study of Finite-time Singularities of Loop Quantum Cosmology Interacting Multifluids
• A Generalized Interacting Tsallis Holographic Dark Energy Model and its thermodynamic implications
• An Effective Sign Switching Dark Energy: Lotka-Volterra Model of Two Interacting Fluids
• Phase space analysis and singularity classification for linearly interacting dark energy models
• Observational constraints and predictions of the interacting dark sector with field-fluid mapping
• Dark Energy Interacting with Dark Matter in Classical Einstein and Loop Quantum Cosmology
• Dynamical analysis of interacting dark energy model in the framework of particle creation mechanism
• Some remarks on the attractor behaviour in ELKO cosmology
• Dynamics of three-form dark energy with dark matter couplings
• Extended Phase Space Analysis of Interacting Dark Energy Models in Loop Quantum Cosmology
• The Classical and Loop Quantum Cosmology Phase Space of Interacting Dark Energy and Superfluid Dark Matter
• Cosmological perturbations in the interacting dark sector: Mapping fields and fluids
• Interacting quintessence in light of Generalized Uncertainty Principle: Cosmological perturbations and dynamics
• Model independent constraints on mass-varying neutrino scenarios
• On the growth of perturbations in interacting dark energy and dark matter fluids
• Dynamics in interacting scalar-torsion theory
• $w_d=-1$ in interacting quintessence model
• Dynamics of Dirac-Born-Infeld dark energy interacting with dark matter
• Generalized holographic Ricci dark energy and generalized second law of thermodynamics in Bianchi Type I universe
• Cosmological evolution with quadratic gravity and nonideal fluids
• Dynamics of viscous cosmologies in the full Israel-Stewart formalism
• III. Interacting Dark Energy: Summary of Models, Pathologies, and Constraints
• Crossing the phantom divide line in the Holographic dark energy model in a closed universe
• Differentiating dark interactions with perturbation
• Observational constraints on interacting vacuum energy with linear interactions
• Generalized Logarithmic Equation of State in Classical and Loop Quantum Cosmology Dark Energy-Dark Matter Coupled Systems
• Holographic dark energy interacting with dark matter in a Closed Universe
• Crossing the Phantom divide line in the Chaplygin gas model
• Forecast Analysis on Interacting Dark Energy Models from Future Generation PICO and DESI Missions
• QCD ghost dark energy cannot (even roughly) explain the main features of the accepted cosmological paradigm
• Reconstructing a non-linear interaction in the dark sector with cosmological observations
• Stable Large-Scale Perturbations in Interacting Dark-Energy Model
• Anisotropic Scalar Field Dark Energy with a Disformally Coupled Yang-Mills Field
• Modified holographic Ricci dark energy coupled to interacting relativistic and non-relativistic dark matter in the nonflat universe
• II. Non-Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Holographic field theory models of dark energy in interaction with dark matter
• Non-Minimal Quintessence With Nearly Flat Potential
• Interacting warm dark matter
• Bulk viscosity, interaction and the viability of phantom solutions
• Phantom-Like Behavior of a DGP-Inspired Scalar-Gauss-Bonnet Gravity
• Phantom-like effects in asymmetric brane embedding with induced gravity and the Gauss-Bonnet term in the Bulk
• Qualitative dynamics of interacting vacuum cosmologies
• Cosmological dynamics and bifurcation analysis of the general non-minimally coupled scalar field models
• Late-time Background Constraints on Linear and Non-linear Interacting Dark Energy after DESI DR2
• I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Emulating dark energy models with known equation of state via the created cold dark matter scenario
• Non-local dilaton coupling to dark matter: cosmic acceleration and pressure backreaction
• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia
• Thermodynamical description of modified generalized Chaplygin gas model of dark energy
• Observational constraints on Tsallis holographic dark energy with Ricci horizon cutoff
• Addressing the $r_d$ Tension using Late-Time Observational Measurements in a Novel deceleration Parametrization
• Global asymptotic dynamics of the cubic galileon interacting with dark matter
• Cosmological dynamics of interacting dark energy and dark matter in $f(Q)$ gravity
• Tracker coupled quintessence
• kSZ Pairwise Velocity Reconstruction with Machine Learning
• Non-minimal Quintessence: Dynamics and coincidence problem
• Cosmological Dynamics of Exponential Quintessence Constrained by BAO, Cosmic Chronometers, and DES-SN5YR/Pantheon+ Data
• Some Classes of Interacting Two-Fluid Model of the Expanding Universe
• Angular momentum and morphological sequence of massive galaxies through Dark Sage
• Generic autonomous system approach to interacting dark energy models
• Generalized Semi-Holographic Universe
• Revisiting dynamics of interacting quintessence
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions