Observational constraints on Luciano-Saridakis entropic cosmology

Abstract

A recently proposed generalized entropy by Luciano and Saridakis extends the standard Boltzmann-Gibbs and Bekenstein-Hawking framework through a microscopically motivated construction involving two independent entropic exponents. When applied within the gravity-thermodynamics correspondence, this entropy leads to a modified cosmological dynamics that can be interpreted as an effective dark energy sector of entropic origin, while recovering $\Lambda$CDM in appropriate limits. In this work, we perform the first observational confrontation of the resulting entropic cosmology at the background level. Focusing on the case ${\alpha }_{\delta }=0$, we constrain the model using Cosmic Chronometers, Pantheon${}^{+}$ Type Ia supernovae calibrated with SH0ES, BAO measurements from DESI DR2 and compressed Planck 2018 CMB information. We find that the model yields a statistically robust fit to the combined data sets and can simultaneously satisfy Pantheon${}^{+}$, SH0ES and CMB shift-parameter constraints, unlike $\Lambda$CDM. Although the entropic parameters remain close to their standard values, the $\Lambda$CDM limit is excluded at the $2\sigma$ level within the restricted parameter space considered. These results indicate that the Luciano-Saridakis entropic cosmology offers a viable extension of the standard model with the potential to alleviate the Hubble tension at the background level.

14 pages, 5 figures. Published in Physics of the Dark Universe 52 (2026) 102333

References in corpus (72)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• The World as a Hologram
• Extended Theories of Gravity
• Thermodynamics of Spacetime: The Einstein Equation of State
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• f(T) teleparallel gravity and cosmology
• The Pantheon+ Analysis: Cosmological Constraints
• Modified Gauss-Bonnet theory as gravitational alternative for dark energy
• Dark torsion as the cosmic speed-up
• Non-Gaussianity from Inflation: Theory and Observations
• A 6% measurement of the Hubble parameter at $z\sim 0.45$: direct evidence of the epoch of cosmic re-acceleration
• Einstein's Other Gravity and the Acceleration of the Universe
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• The Pantheon+ Analysis: The Full Dataset and Light-Curve Release
• Thermodynamical Aspects of Gravity: New insights
• Quintom Cosmology: Theoretical implications and observations
• First Law of Thermodynamics and Friedmann Equations of Friedmann-Robertson-Walker Universe
• Cobaya: Code for Bayesian Analysis of hierarchical physical models
• Black hole thermodynamical entropy
• Statistical mechanics in the context of special relativity
• Gravity and the Thermodynamics of Horizons
• Thermodynamic Behavior of Friedmann Equation at Apparent Horizon of FRW Universe
• Non-equilibrium Thermodynamics of Spacetime
• The Area of a Rough Black Hole
• Nonextensivity and multifractality in low-dimensional dissipative systems
• Statistical mechanics in the context of special relativity II
• Unified First Law and Thermodynamics of Apparent Horizon in FRW Universe
• Friedmann Equations of FRW Universe in Scalar-tensor Gravity, f(R) Gravity and First Law of Thermodynamics
• Construction of cosmologically viable f(G) gravity models
• Modified teleparallel theories of gravity
• Thermodynamic route to Field equations in Lanczos-Lovelock Gravity
• Dark energy and the generalized second law
• Teleparallel equivalent of Gauss-Bonnet gravity and its modifications
• New constraints on cosmological parameters and neutrino properties using the expansion rate of the Universe to z~1.75
• Setting the Stage for Cosmic Chronometers. II. Impact of Stellar Population Synthesis Models Systematics and Full Covariance Matrix
• Inflation and de Sitter Thermodynamics
• Thermodynamics of dark energy interacting with dark matter and radiation
• Effective Field Theory of Dark Energy: a Review
• Early and late universe holographic cosmology from a new generalized entropy
• Modified Friedmann Equations from Tsallis Entropy
• Modified cosmology through spacetime thermodynamics and Barrow horizon entropy
• Can Horndeski Theory be recast using Teleparallel Gravity?
• Horizon Thermodynamics and Gravitational Field Equations in Horava-Lifshitz Gravity
• The generalized second law of thermodynamics in Horava-Lifshitz cosmology
• Fourth order Weyl gravity
• Modified cosmology through nonextensive horizon thermodynamics
• Thermodynamical First Laws of Black Holes in Quadratically-Extended Gravities
• Non-metricity with bounday terms: $f(Q,C)$ gravity and cosmology
• The first law of thermodynamics in Lifshitz black holes revisited
• Baryogenesis in non-extensive Tsallis Cosmology
• Barrow holographic dark energy in the Brans-Dicke cosmology
• Alleviating both $H_0$ and ${\sigma }_8$ tensions in Tsallis cosmology
• First laws of thermodynamics in IR Modified Hǒrava-Lifshitz gravity
• $P-v$ criticalities, phase transitions and geometrothermodynamics of charged AdS black holes from Kaniadakis statistics
• Black hole geometrothermodynamics and critical phenomena: a look from Tsallis entropy-based perspective
• Tsallis cosmology and its applications in dark matter physics with focus on IceCube high-energy neutrino data
• Imprints of Barrow-Tsallis Cosmology in Primordial Gravitational Waves
• Constraints on Tsallis Cosmology from Big Bang Nucleosynthesis and the Relic Abundance of Cold Dark Matter Particles
• Modified Cosmology Models from Thermodynamical Approach
• Fractional Holographic Dark Energy
• Thermodynamically consistent entropic late-time cosmological acceleration
• Modified cosmology from quantum deformed entropy
• Barrow and Tsallis entropies after the DESI DR2 BAO data
• Inflation Based on the Tsallis Entropy
• Cosmology-informed neural networks to solve the background dynamics of the Universe
• Modified Friedmann equations from fractional entropy
• Investigation of generalised uncertainty principle effects on FRW cosmology
• Rényi Holographic Dark Energy
• Testing the consistency of early and late cosmological parameters with BAO and CMB data
• Holographic reconstruction of k-essence model with Tsallis and the most generalized Nojiri-Odintsov version of holographic dark energy
• Exponential correction to Friedmann equations