Reconstructing the generalized Barrow holographic dark energy with physics-informed neural networks

[2608.27469] Reconstructing the generalized Barrow holographic dark energy with physics-informed neural networks Skip to main content Search Submit Donate Log in Physics > General Physics arXiv:2608.27469 (physics) [Submitted on 14 Aug 2026 ( v1 ), last revised 2 Nov 2026 (this version, v2)] Title: Reconstructing the generalized Barrow holographic dark energy with physics-informed neural networks Authors: Spyros Basilakos , Andronikos Paliathanasis , Emmanuel N. Saridakis , Stylianos A. Tsilioukas View PDF HTML (experimental) Abstract: Barrow holographic dark energy connects cosmic acceleration with possible quantum-gravitational deformations of horizon entropy, encoded in the Barrow exponent $\Delta$. If such effects are scale dependent, however, there is no fundamental reason for $\Delta$ to remain constant throughout cosmic history. In this work we reconstruct $\Delta(z)$ directly from observations, without assuming any particular functional form, using the Cosmo-PINN physics-informed neural-network framework. The generalized Barrow holographic evolution equation is incorporated into the training, while PantheonPlus supernovae, DESI DR2 baryon acoustic oscillations and cosmic chronometers constrain the reconstruction. We find a mild and smooth redshift evolution, with the posterior mean favoring negative $\Delta$ and this tendency becoming stronger when the Cepheid calibration is included. Nevertheless, $\Delta=0$ and constant negative values remain compatible with current uncertainties. The reconstructed cosmology yields a viable late-time evolution, with $w_{\rm DE}$ close to $-1$ and the expected transition to accelerated expansion. Our results demonstrate that cosmological observations can directly probe the functional behavior of a quantity entering the underlying entropy law itself. Comments: 14 pages, 7 figures; accepted for publication in EPJC Subjects: General Physics (physics.gen-ph) Cite as: arXiv:2608.27469 [physics.gen-ph] (or arXiv:2608.27469v2 [physics.gen-ph] for this version) https://doi.org/10.48550/arXiv.2608.27469 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Andronikos Paliathanasis [ view email ] [v1] Fri, 14 Aug 2026 13:06:57 UTC (442 KB) [v2] Mon, 2 Nov 2026 07:42:45 UTC (1,141 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Current browse context: physics.gen-ph < prev | next > new | recent | 2026-08 Change to browse by: physics References & Citations SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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