Observational constraints on Luciano-Saridakis entropic cosmology
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866913147013562368 |
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| author | Leizerovich, Matías Landau, Susana J. Luciano, Giuseppe Gaetano Papatriantafyllou, Andreas Saridakis, Emmanuel N. |
| author_facet | Leizerovich, Matías Landau, Susana J. Luciano, Giuseppe Gaetano Papatriantafyllou, Andreas Saridakis, Emmanuel N. |
| contents | 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 $Λ$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 $α_δ=0$, 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 $Λ$CDM. Although the entropic parameters remain close to their standard values, the $Λ$CDM limit is excluded at the $2σ$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_03568 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Observational constraints on Luciano-Saridakis entropic cosmology Leizerovich, Matías Landau, Susana J. Luciano, Giuseppe Gaetano Papatriantafyllou, Andreas Saridakis, Emmanuel N. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Phenomenology High Energy Physics - Theory 85A40, 62F15, 83F05 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 $Λ$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 $α_δ=0$, 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 $Λ$CDM. Although the entropic parameters remain close to their standard values, the $Λ$CDM limit is excluded at the $2σ$ 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. |
| title | Observational constraints on Luciano-Saridakis entropic cosmology |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Experiment High Energy Physics - Phenomenology High Energy Physics - Theory 85A40, 62F15, 83F05 |
| url | https://arxiv.org/abs/2603.03568 |