Revisiting a negative cosmological constant from low-redshift data

Abstract

Persisting tensions between high-redshift and low-redshift cosmological observations suggest the dark energy sector of the Universe might be more complex than the positive cosmological constant of the $\Lambda$CDM model. Motivated by string theory, wherein symmetry considerations make consistent AdS backgrounds (\textit (i.e.) maximally symmetric spacetimes with a negative cosmological constant) ubiquitous, we explore a scenario where the dark energy sector consists of two components: a negative cosmological constant, with a dark energy component with equation of state $w_{\varphi }$ on top. We test the consistency of the model against low-redshift Baryon Acoustic Oscillation and Type Ia Supernovae distance measurements, assessing two alternative choices of distance anchors: the sound horizon at baryon drag determined by the \textit{Planck} collaboration, and the Hubble constant determined by the SH0ES program. We find no evidence for a negative cosmological constant, and mild indications for an effective phantom dark energy component on top. A model comparison analysis reveals the $\Lambda$CDM model is favoured over our negative cosmological constant model. While our results are inconclusive, should low-redshift tensions persist with future data, it would be worth reconsidering and further refining our toy negative cosmological constant model by considering realistic string constructions.

arXiv commentv3: 15 pages, 1 table containing 6 figures, updated title to reflect title in the published version, added publication details. Version published in Symmetry as an invited feature paper in the special issue "Anomalies and Tensions of the Cosmic Microwave Background"

References in corpus (265)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• emcee: The MCMC Hammer
• The Large N Limit of Superconformal Field Theories and Supergravity
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• de Sitter Vacua in String Theory
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Where are the missing galactic satellites?
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• Phantom Energy and Cosmic Doomsday
• Observational evidence for self-interacting cold dark matter
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• A 2.4% Determination of the Local Value of the Hubble Constant
• Axion Cosmology
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• String Axiverse
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Coupled Quintessence
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
• Axions In String Theory
• The Simons Observatory: Science goals and forecasts
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• A 3% Solution: Determination of the Hubble Constant with the Hubble Space Telescope and Wide Field Camera 3
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Properties of singularities in (phantom) dark energy universe
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Supergravity description of field theories on curved manifolds and a no go theorem
• Dark Matter Self-interactions and Small Scale Structure
• Early Dark Energy Can Resolve The Hubble Tension
• The Kinematics of the Ultra-Faint Milky Way Satellites: Solving the Missing Satellite Problem
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• The Swampland: Introduction and Review
• Quintom Cosmology: Theoretical implications and observations
• The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
• Cosmological Evolution of a Quintom Model of Dark Energy
• The Core-Cusp Problem
• A Redetermination of the Hubble Constant with the Hubble Space Telescope from a Differential Distance Ladder
• Distance and de Sitter Conjectures on the Swampland
• Cosmological implications of baryon acoustic oscillation (BAO) measurements
• Braneworld models of dark energy
• The trouble with $H_0$
• Exploring the String Axiverse with Precision Black Hole Physics
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• Imperfect Dark Energy from Kinetic Gravity Braiding
• Can dark energy evolve to the Phantom?
• Status of neutrino oscillations 2018: first hint for normal mass ordering and improved CP sensitivity
• Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
• On the Cosmological Implications of the String Swampland
• New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
• CfA3: 185 Type Ia Supernova Light Curves from the CfA
• The type IIB string axiverse and its low-energy phenomenology
• Beyond Collisionless Dark Matter: Particle Physics Dynamics for Dark Matter Halo Structure
• Dynamical dark energy in light of the latest observations
• Cold dark matter: controversies on small scales
• H0LiCOW V. New COSMOGRAIL time delays of HE0435-1223: $H_0$ to 3.8% precision from strong lensing in a flat $\Lambda$CDM model
• Finite-time future singularities in modified Gauss-Bonnet and $\mathcal{F}(R,G)$ gravity and singularity avoidance
• Bounds on Slow Roll and the de Sitter Swampland
• Can interacting dark energy solve the $H_0$ tension?
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• Unveiling $\nu$ secrets with cosmological data: neutrino masses and mass hierarchy
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
• Large-scale instability in interacting dark energy and dark matter fluids
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• H0LiCOW - IX. Cosmographic analysis of the doubly imaged quasar SDSS 1206+4332 and a new measurement of the Hubble constant
• Reconciling Planck with the local value of $H_0$ in extended parameter space
• The Neutrino Puzzle: Anomalies, Interactions, and Cosmological Tensions
• Tale of stable interacting dark energy, observational signatures, and the $H_0$ tension
• What if string theory has no de Sitter vacua?
• H0 Revisited
• Dissipative hidden sector dark matter
• Neutrino masses and cosmology with Lyman-alpha forest power spectrum
• Cosmological implications of ultra-light axion-like fields
• Crossing the Phantom Divide: Dark Energy Internal Degrees of Freedom
• Super-acceleration as Signature of Dark Sector Interaction
• Phantom crossing, equation-of-state singularities, and local gravity constraints in f(R) models
• Does the Hubble constant tension call for new physics?
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Small scale problems of the $\Lambda$CDM model: a short review
• Is dark matter with long-range interactions a solution to all small-scale problems of ΛCDM cosmology?
• Observational Constraints on Dark Energy and Cosmic Curvature
• Acoustic Dark Energy: Potential Conversion of the Hubble Tension
• Mimetic gravity: a review of recent developments and applications to cosmology and astrophysics
• Cosmologies with Energy Exchange
• The Effective Theory of Quintessence: the w<-1 Side Unveiled
• $f(T)$ models with phantom divide line crossing
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• Sounds Discordant: Classical Distance Ladder & $\Lambda$CDM -based Determinations of the Cosmological Sound Horizon
• There is No Missing Satellites Problem
• Constraints on the sum of the neutrino masses in dynamical dark energy models with $w(z)\ge -1$ are tighter than those obtained in $\Lambda$CDM
• The landscape, the swampland and the era of precision cosmology
• Echo of interactions in the dark sector
• Probing the interaction between dark matter and dark energy in the presence of massive neutrinos
• Redefining the Missing Satellites Problem
• Interacting scenarios with dynamical dark energy: observational constraints and alleviation of the $H_0$ tension
• Quintessence, super-quintessence and observable quantities in Brans-Dicke and non-minimally coupled theories
• On the de Sitter swampland criterion
• The Data Release of the Sloan Digital Sky Survey-II Supernova Survey
• The implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions
• The BAO+BBN take on the Hubble tension
• Dark coupling
• Constraining Dark Energy Dynamics in Extended Parameter Space
• Interacting dark energy with time varying equation of state and the $H_0$ tension
• The Carnegie Supernova Project: Absolute Calibration and the Hubble Constant
• Late universe decaying dark matter can relieve the H_0 tension
• Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
• Reducing the $H_0$ and ${\sigma }_8$ tensions with Dark Matter-neutrino interactions
• On the improvement of cosmological neutrino mass bounds
• Galileon Gravity in Light of ISW, CMB, BAO and $H_0$ data
• The string swampland constraints require multi-field inflation
• Simple de Sitter Solutions
• Interacting Dark Sector and Precision Cosmology
• The $H_0$ tension in light of vacuum dynamics in the Universe
• Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles
• Towards Classical de Sitter Solutions in String Theory
• Efficient Cosmological Parameter Estimation from Microwave Background Anisotropies
• Can the $H_0$ tension be resolved in extensions to $\Lambda$CDM cosmology?
• New constraints on interacting dark energy from cosmic chronometers
• Structure formation in $f(T)$ gravity and a solution for $H_0$ tension
• Model independent constraints on dark energy evolution from low-redshift observations
• A Vacuum Phase Transition Solves $H_0$ Tension
• Dark sector interaction: a remedy of the tensions between CMB and LSS data
• Observational constraints on one-parameter dynamical dark-energy parametrizations and the $H_0$ tension
• Nonlocal gravity. Conceptual aspects and cosmological predictions
• Clarifying the Hubble constant tension with a Bayesian hierarchical model of the local distance ladder
• De Sitter vs Quintessence in String Theory
• Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity
• Measuring Dark Energy Properties with Photometrically Classified Pan-STARRS Supernovae. II. Cosmological Parameters
• Astrophysical limits on very light axion-like particles from Chandra grating spectroscopy of NGC 1275
• Dark Energy in the Swampland
• Phantom Cosmology without Big Rip Singularity
• Unification of Constant-roll Inflation and Dark Energy with Logarithmic $R^2$-corrected and Exponential $F(R)$ Gravity
• Constraints on the Coupling between Dark Energy and Dark Matter from CMB data
• Dark energy, $\alpha$-attractors, and large-scale structure surveys
• The zoo plot meets the swampland: mutual (in)consistency of single-field inflation, string conjectures, and cosmological data
• A blinded determination of $H_0$ from low-redshift Type Ia supernovae, calibrated by Cepheid variables
• A local resolution of the Hubble tension: The impact of screened fifth forces on the cosmic distance ladder
• Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
• De Sitter hunting in a classical landscape
• Model independent $H(z)$ reconstruction using the cosmic inverse distance ladder
• LXCDM: a cosmon model solution to the cosmological coincidence problem?
• Evolution of dark energy reconstructed from the latest observations
• Cosmological window onto the string axiverse and the supersymmetry breaking scale
• Observational constraints on sign-changeable interaction models and alleviation of the $H_0$ tension
• CDM Accelerating Cosmology as an Alternative to LCDM model
• A note on Inflation and the Swampland
• Accelerating Cold Dark Matter Cosmology (${\Omega }_{\Lambda }\equiv 0$)
• Solving the small-scale structure puzzles with dissipative dark matter
• Axion-Dilaton Destabilization and the Hubble Tension
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• Diurnal modulation signal from dissipative hidden sector dark matter
• Covariant Horava-like and mimetic Horndeski gravity: cosmological solutions and perturbations
• Constraining Dark Matter -- Dark Radiation interactions with CMB, BAO, and Lyman-$\alpha$
• Scale-dependent galaxy bias, CMB lensing-galaxy cross-correlation, and neutrino masses
• An analytic model for interacting dark energy and its observational constraints
• On Classical de Sitter Vacua in String Theory
• Calibrating the cosmic distance scale ladder: the role of the sound horizon scale and the local expansion rate as distance anchors
• Cosmological dynamics of mimetic gravity
• Can we be tricked into thinking that w is less than -1?
• A new interacting two fluid model and its consequences
• $f(R)$ Gravity Inflation with String-Corrected Axion Dark Matter
• The Viability of Phantom Dark Energy: A Brief Review
• Partially Acoustic Dark Matter, Interacting Dark Radiation, and Large Scale Structure
• Implications of a transition in the dark energy equation of state for the $H_0$ and ${\sigma }_8$ tensions
• 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
• Mimicking dark matter and dark energy in a mimetic model compatible with GW170817
• A 3.55 keV Photon Line and its Morphology from a 3.55 keV ALP Line
• Insensitivity of The Distance Ladder Hubble Constant Determination to Cepheid Calibration Modeling Choices
• On phenomenological models of dark energy interacting with dark matter
• Determining $H_0$ with Bayesian hyper-parameters
• Cosmological consequences of an adiabatic matter creation process
• Search for sterile neutrinos in holographic dark energy cosmology: Reconciling Planck observation with the local measurement of the Hubble constant
• Substructure of fuzzy dark matter haloes
• Eternal Inflation and the Refined Swampland Conjecture
• Universal de Sitter solutions at tree-level
• How the Dark Energy Can Reconcile \textit{Planck} with Local Determination of the Hubble Constant
• Light dark photon and fermionic dark radiation for the Hubble constant and the structure formation
• Dark sectors with dynamical coupling
• A model with interaction of dark components and recent observational data
• Scalar Field Dark Matter: Helping or Hurting Small-Scale Problems in Cosmology?
• A note on obstinate tachyons in classical dS solutions
• Do We Live in the Swampland?
• $H_0$ tension as a hint for a transition in gravitational theory
• Reconciling $H_0$ tension in a six parameter space?
• Constraining interacting dark energy models with latest cosmological observations
• Effects of Anisotropic Stress in Interacting Dark Matter - Dark Energy Scenarios
• Phenomenology of Modified Gravity at Recombination
• Ginzburg-Landau Theory of Dark Energy: A Framework to Study Both Temporal and Spatial Cosmological Tensions Simultaneously
• de Sitter Vacua in Type IIB String Theory: Classical Solutions and Quantum Corrections
• Probing the Early Universe with Axion Physics and Gravitational Waves
• Phantom behavior via cosmological creation of particles
• Gravitational wave forest from string axiverse
• Can Light Dark Matter Solve the Core-Cusp Problem?
• Model-independent determination of $H_0$ and ${\Omega }_{K0}$ from strong lensing and type Ia supernovae
• Matter Power Spectrum in Hidden Neutrino Interacting Dark Matter Models: A Closer Look at the Collision Term
• Suppressing structure formation at dwarf galaxy scales and below: late kinetic decoupling as a compelling alternative to warm dark matter
• Evolution and Dynamics of a Matter creation model
• Late time transitions in the quintessence field and the $H_0$ tension
• Heal the world: Avoiding the cosmic doomsday in the holographic dark energy model
• Dawn of the dark: unified dark sectors and the EDGES Cosmic Dawn 21-cm signal
• Constraints on the neutrino mass and mass hierarchy from cosmological observations
• Strong Bayesian Evidence for the Normal Neutrino Hierarchy
• Do current cosmological observations rule out all Covariant Galileons?
• Dynamics of nonlinear interacting dark energy models
• Changing the prior: absolute neutrino mass constraints in nonlocal gravity
• Light axion-like dark matter must be present during inflation
• Big smash of the universe
• A search for sterile neutrinos with the latest cosmological observations
• A Quintom scenario with mixed kinetic terms
• Challenging bulk viscous unified scenarios with cosmological observations
• The Cosmophenomenology of Axionic Dark Radiation
• The $H_0$ and ${\sigma }_8$ tensions and the scale invariant spectrum
• Partially Acoustic Dark Matter Cosmology and Cosmological Constraints
• Primordial gravitational waves and the H0-tension problem
• Future Constraints on Dynamical Dark-Energy using Gravitational-Wave Standard Sirens
• Cosmological bounds on dark matter-photon coupling
• Large-scale (in-) stability Analysis of an Exactly Solved Coupled Dark-Energy Model
• Cosmology in new gravitational scalar-tensor theories
• Future CMB cosmological constraints in a dark coupled universe
• Neutrino flavor oscillations in a curved space-time
• A Global View on The Search for de-Sitter Vacua in (type IIA) String Theory
• Observational constraints of a new unified dark fluid and the $H_0$ tension
• Is the $H_0$ tension suggesting a 4th neutrino's generation?
• Latest astronomical constraints on some nonlinear parametric dark energy models
• Constraints on quintessence scalar field models using cosmological observations
• Search for sterile neutrinos in a universe of vacuum energy interacting with cold dark matter
• Dark Catalysis
• Gravitationally induced adiabatic particle production: From Big Bang to de Sitter
• Oscillations of the F(R) dark energy in the accelerating universe
• Consistency of the local Hubble constant with the cosmic microwave background
• Phantom crossing and quintessence limit in extended nonlinear massive gravity
• Do joint CMB and HST data support a scale invariant spectrum?
• Searching for sterile neutrinos in dynamical dark energy cosmologies
• $\nu$Galileon: modified gravity with massive neutrinos as a testable alternative to $\Lambda$CDM
• Forecasting Interacting Vacuum-Energy Models using Gravitational Waves
• Composite dark energy: cosmon models with running cosmological term and gravitational coupling
• Beyond-one-loop quantum gravity action yielding both inflation and late-time acceleration
• Phantom without ghost
• Inflation Model Selection meets Dark Radiation
• Cosmological searches for a non-cold dark matter component
• Two-fluid solutions of particle-creation cosmologies
• Narrowing down the possible explanations of cosmic acceleration with geometric probes
• Evaporating primordial black holes as varying dark energy
• CMB constraints on $\beta$-exponential inflationary models
• Cosmological solutions with gravitational particle production and non-zero curvature
• Super-CMB fluctuations and the Hubble tension
• Will there be future deceleration? A study of particle creation mechanism in non-equilibrium thermodynamics
• Quintessence and phantom dark energy from ghost D-branes
• Cosmological constraints and phenomenology of a beyond-Horndeski model
• K-mouflage Imprints on Cosmological Observables and Data Constraints
• Gravitationally influenced particle creation models and late-time cosmic acceleration
• Quintessence and the Underlying Particle Physics Theory
• Interacting Scalar Radiation and Dark Matter in Cosmology
• Cosmological histories in bimetric gravity: A graphical approach
• Decaying dark energy in light of the latest cosmological dataset
• Examining the Viability of Phantom Dark Energy
• A Cosmological Study in Massive Gravity theory
• Forays into the dark side of the swamp
• Phantom Dirac-Born-Infeld Dark Energy

Cited by in corpus (123)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• Challenges for $\Lambda$CDM: An update
• Horizon-scale tests of gravity theories and fundamental physics from the Event Horizon Telescope image of Sagittarius A${}^{\ast }$
• Cosmology Intertwined II: The Hubble Constant Tension
• New physics in light of the $H_0$ tension: an alternative view
• Non-minimal dark sector physics and cosmological tensions
• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Is the Hubble tension a hint of AdS phase around recombination?
• New Early Dark Energy
• Eppur è piatto? The cosmic chronometer take on spatial curvature and cosmic concordance
• Consistency tests of $\Lambda$CDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• Graduated dark energy: Observational hints of a spontaneous sign switch in the cosmological constant
• DESI 2024: Reconstructing Dark Energy using Crossing Statistics with DESI DR1 BAO data
• Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
• Concerns regarding the use of black hole shadows as standard rulers
• Relaxing cosmological tensions with a sign switching cosmological constant
• The galaxy power spectrum take on spatial curvature and cosmic concordance
• Nonparametric late-time expansion history reconstruction and implications for the Hubble tension in light of recent DESI and type Ia supernovae data
• Implications for the Hubble tension from the ages of the oldest astrophysical objects
• Negative cosmological constant in the dark sector?
• Do we have any hope of detecting scattering between dark energy and baryons through cosmology?
• Relaxing cosmological tensions with a sign switching cosmological constant: Improved results with Planck, BAO, and Pantheon data
• Dark energy in light of the early JWST observations: case for a negative cosmological constant?
• Quintom cosmology and modified gravity after DESI 2024
• Evidence for Emergent Dark Energy
• Neutrino cosmology after DESI: tightest mass upper limits, preference for the normal ordering, and tension with terrestrial observations
• Reconciling $H_0$ tension in a six parameter space?
• Do cosmological observations allow a negative $\Lambda$?
• The state of the dark energy equation of state circa 2023
• Omnipotent dark energy: A phenomenological answer to the Hubble tension
• Towards early dark energy and $n_s$=1 with Planck, ACT and SPT
• The Hubble Tension as a Hint of Leptogenesis and Neutrino Mass Generation
• Measurements of $H_0$ and reconstruction of the dark energy properties from a model-independent joint analysis
• Ups and Downs in Dark Energy: phase transition in dark sector as a proposal to lessen cosmological tensions
• Dawn of the dark: unified dark sectors and the EDGES Cosmic Dawn 21-cm signal
• Cosmological constraints on late-universe decaying dark matter as a solution to the $H_0$ tension
• Looking for interactions in the cosmological dark sector
• Negative cosmological constant in the dark energy sector: tests from JWST photometric and spectroscopic observations of high-redshift galaxies
• $T_0$ censorship of early dark energy and AdS vacua
• Rastall gravity extension of the standard $\Lambda$CDM model: theoretical features and observational constraints
• Data-driven Reconstruction of the Late-time Cosmic Acceleration with f(T) Gravity
• Testing AdS early dark energy with Planck, SPTpol and LSS data
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Multidimensionality of the Hubble tension: the roles of ${\Omega }_m$ and ${\omega }_c$
• Combining pre- and post-recombination new physics to address cosmological tensions: case study with varying electron mass and sign-switching cosmological constant
• Emergent Dark Energy, neutrinos and cosmological tensions
• Simple-graduated dark energy and spatial curvature
• Late-Time constraints on Interacting Dark Energy: Analysis independent of $H_0$, $r_d$ and $M_B$
• Is the dark energy equation of state parameter singular?
• Metastable dark energy models in light of Planck 2018: Alleviating the $H_0$ tension
• On the dynamics of a dark sector coupling
• Late time acceleration due to generic modification of gravity and Hubble tension
• Model selection applied to reconstructions of the Dark Energy
• Cosmological constraints on ${\Lambda }_{\mathrm{s}}$CDM scenario in a type II minimally modified gravity
• Cosmic expansion parametrization: Implication for curvature and ${\text{H}}_0$ tension
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• An Effective Sign Switching Dark Energy: Lotka-Volterra Model of Two Interacting Fluids
• Cosmology With Low-Redshift Observations: No Signal For New Physics
• Testing dark energy after pre-recombination early dark energy
• Smoothing the $H_0$ tension with a dynamical dark energy model
• Hubble tension as a guide for refining the early Universe: Cosmologies with explicit local Lorentz and diffeomorphism violation
• Cosmology with relativistically varying physical constants
• Multiple transitions in vacuum dark energy and $H_0$ tension
• Inevitable manifestation of wiggles in the expansion of the late Universe
• Transition dynamics in the ${\Lambda }_{\mathrm{s}}$CDM model: Implications for bound cosmic structures
• ${\Lambda }_{\mathrm{s}}$CDM cosmology: Alleviating major cosmological tensions by predicting standard neutrino properties
• Implications of an extended dark energy model with massive neutrinos
• Towards a possible solution to the Hubble tension with Horndeski gravity
• New late-time constraints on $f(R)$ gravity
• Questioning the $H_0$ tension via the look-back time
• Can phantom transition at $z\sim 1$ restore the Cosmic concordance?
• Exploring new physics in the late Universe's expansion through non-parametric inference
• Coupled Multi Scalar Field Dark Energy
• Negative scalar potentials and the swampland: an Anti-Trans-Planckian Censorship Conjecture
• Planck-PR4 anisotropy spectra show (better) consistency with General Relativity
• A Model of Interacting Dark Matter and Dark Radiation for $H_0$ and ${\sigma }_8$ Tensions
• Testing the $n_s-H_0$ scaling relation with Planck-independent CMB data
• A critical discussion on the $H_0$ tension
• Gravitational Lensing in Kerr-Newman Anti de Sitter Spacetime
• Developed Method. Interactions and their quantum picture
• III. Interacting Dark Energy: Summary of Models, Pathologies, and Constraints
• Unexplored regions in teleparallel $f(T)$ gravity: Sign-changing dark energy density
• Phase-space analysis of dark energy models in non-minimally coupled theories of gravity
• Friedmann equations in the Codazzi parametrization of Cotton and extended theories of gravity and the Dark Sector
• Dynamical analysis of logarithmic energy-momentum squared gravity
• Does the fraction of dark matter diminish with early dark energy?
• Linear matter density perturbations in the ${\Lambda }_{\mathrm{s}}$CDM model: Examining growth dynamics and addressing the $S_8$ tension
• A visual tool for assessing tension-resolving models in the $H_0$-${\sigma }_8$ plane
• Dark effects in $f(R,P)$ gravity
• Post-reionization HI 21-cm signal: A probe of negative cosmological constant
• A study of interacting scalar field model from the perspective of the dynamical systems theory
• Do we need wavelets in the late Universe?
• Reference level of the vacuum energy density of the Universe and astrophysical data
• Imprints of screened dark energy on nonlocal quantum correlations
• ${\Lambda }_{\mathrm{s}}$CDM cosmology from a type-II minimally modified gravity
• Perturbations in the interacting vacuum
• Revisiting CPL with sign-switching density: To cross or not to cross the NECB
• Quintessential Implications of the presence of AdS in the Dark Energy sector
• 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
• Effects of particle creation rate in two-fluid interacting cosmologies
• Addressing the $r_d$ Tension using Late-Time Observational Measurements in a Novel deceleration Parametrization
• Cosmological evolution with negative energy densities
• One Extension to Explain Them All, One Scale-Invariant Spectrum to Test Them All, and in One Model Bind Them
• Can an Anti-de Sitter Vacuum in the Dark Energy Sector Explain JWST High-Redshift Galaxy and Reionization Observations?
• Dynamical systems analysis of a cosmological model with interacting Umami Chaplygin fluid in adiabatic particle creation mechanism: Some bouncing features
• Cosmic Strings as Dynamical Dark Energy: Novel Constraints
• Thermodynamics of a transient phantom scenario
• Gravitational waves in gauge theory gravity with a negative cosmological constant
• Testing Exponential $f(R)$ Gravity with CMB, DESI-DR2, and Supernova Data
• Nonlinear Matter Power Spectrum from relativistic $N$-body Simulations: ${\Lambda }_{\mathrm{s}}$CDM versus $\Lambda$CDM
• Why $w\ne -1$? Anthropic Selection in a $\Lambda$ + Axion Dark Energy Model
• Thermodynamics of sign-switching dark energy models
• Implications of single field inflation in general cosmological scenarios on the nature of dark energy given the swampland conjectures
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Probing dark energy using anisotropies in the clustering of post-EoR HI distribution
• Background-level reconstruction of scalar-field potentials from dark-energy histories and comparison with analytic potential families
• Sign Switching Dark Energy from a Running Barrow Entropy
• Bouncing cosmologies in the presence of a Dirac-Born-Infeld field
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions