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Geometrical observational bounds on a fractal horizon holographic dark energy

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arxiv 2009.08306 v1 pith:RYL7KVB6 submitted 2020-09-16 astro-ph.CO gr-qchep-th

Mariusz P. Dabrowski , Vincenzo Salzano This is my paper · ORCID
classification astro-ph.COgr-qchep-th
keywords energydarkcosmologicalfractalhorizonhubbleobservationalparameter
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abstract

A novel fractal structure for the cosmological horizon, inspired by COVID-19 geometry, which results in a modified area entropy, is applied to cosmology in order to serve dark energy. The constraints based on a complete set of observational data are derived. There is a strong Bayesian evidence in favor of such a dark energy in comparison to a standard $\Lambda$CDM model and that this energy cannot be reduced to a cosmological constant. Besides, there is a shift towards smaller values of baryon density parameter and towards larger values of the Hubble parameter, which reduces the Hubble tension.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Cosmological consequences of scale-dependent Barrow-Tsallis entropy

    gr-qc 2026-07 conditional novelty 6.0 of 10

    A scale-dependent Barrow-Tsallis entropy cosmology fits cosmic data but is statistically disfavored versus ΛCDM, with only a modest and partially circular Hubble-tension 'alleviation'.

  2. Modified Cosmology from Mass-to-Horizon Relation: Observational Bounds

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Observational constraints pin the MHR entropy exponent to |m−1|≲10⁻⁴ when γ is fixed, and Bayesian evidence disfavors all tested horizon-entropy extensions relative to ΛCDM.

  3. A comprehensive numerical study on four categories of holographic dark energy models

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Seven holographic dark energy models are constrained with DESI BAO, Planck CMB, and PantheonPlus supernovae; LambdaCDM stays preferred, Ricci dark energy is ruled out, and event-horizon models show large data-set-depe...

  4. Modified Cosmology from Mass-to-Horizon Relation: Background Evolution

    gr-qc 2026-06 unverdicted novelty 5.0 of 10

    Viable generalized horizon entropies from the mass-to-horizon relation are restricted to a narrow neighborhood around the Bekenstein-Hawking law, yielding only Lambda-CDM-like background evolution.

  5. Hints Beyond $\Lambda$CDM from Barrow and Tsallis Holographic Dark Energy with GO cutoff

    gr-qc 2026-01 conditional novelty 5.0 of 10

    Barrow holographic dark energy with the Granda-Oliveros cutoff fits current background data as well as ΛCDM and shows a weak AIC preference only for the Union3-based dataset combination.

  6. Barrow and Tsallis entropies after the DESI DR2 BAO data

    gr-qc 2025-04 conditional novelty 5.0 of 10

    DESI DR2 BAO data, combined with supernovae and cosmic chronometers, favor a negative Barrow entropy parameter that corresponds to mildly phantom dark energy, but Lambda-CDM is still slightly preferred by information ...

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