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Observational constraints on Barrow holographic dark energy
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abstract
We use observational data from Supernovae (SNIa) Pantheon sample, as well as from direct measurements of the Hubble parameter from the cosmic chronometers (CC) sample, in order to extract constraints on the scenario of Barrow holographic dark energy. The latter is a holographic dark energy model based on the recently proposed Barrow entropy, which arises from the modification of the black-hole surface due to quantum-gravitational effects. We first consider the case where the new deformation exponent $\Delta$ is the sole model parameter, and we show that although the standard value $\Delta=0$, which corresponds to zero deformation, lies within the 1$\sigma$ region, a deviation is favored. In the case where we let both $\Delta$ and the second model parameter to be free we find that a deviation from standard holographic dark energy is preferred. Additionally, applying the Akaike, Bayesian and Deviance Information Criteria, we conclude that the one-parameter model is statistically compatible with $\Lambda$CDM paradigm, and preferred comparing to the two-parameter one. Finally, concerning the present value of the Hubble parameter we find that it is close to the Planck value.
Forward citations
Cited by 5 Pith papers
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Cosmological consequences of scale-dependent Barrow-Tsallis entropy
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'.
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A comprehensive numerical study on four categories of holographic dark energy models
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...
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Hints Beyond $\Lambda$CDM from Barrow and Tsallis Holographic Dark Energy with GO cutoff
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.
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Constraints on Barrow and Tsallis Holographic Dark Energy from DESI DR2 BAO data
Barrow and Tsallis holographic dark energy models fit DESI DR2 data but are disfavored by information criteria versus LambdaCDM and do not ease the Hubble tension.
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Interacting Barrow Holographic Dark Energy in Non-flat Universe
Derives a non-flat interacting Barrow holographic dark energy model and fits it to CC and Pantheon data, but the statistical claim of preference is contradicted by the paper's own AIC/BIC/DIC table.
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