{
  "abstract": "Barrow holographic dark energy connects cosmic acceleration with possible quantum-gravitational deformations of horizon entropy, encoded in the Barrow exponent $Δ$. If such effects are scale dependent, however, there is no fundamental reason for $Δ$ to remain constant throughout cosmic history. In this work we reconstruct $Δ(z)$ 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 $Δ$ and this tendency becoming stronger when the Cepheid calibration is included. Nevertheless, $Δ=0$ 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.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.27469",
  "author_total": 4,
  "authors": [
    {
      "name": "Spyros Basilakos"
    },
    {
      "name": "Andronikos Paliathanasis"
    },
    {
      "name": "Emmanuel N. Saridakis"
    },
    {
      "name": "Stylianos A. Tsilioukas"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ezdt5b9g8a2yn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.27469",
  "fulltext_url": null,
  "id": "ezdt5b9g8a2yn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.27469",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.gen-ph"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7204824795",
  "pdf_url": "https://arxiv.org/pdf/2608.27469",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ezdt5b9g8a2yn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "2608.27469",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.27469"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Reconstructing the generalized Barrow holographic dark energy with physics-informed neural networks",
  "title_text": "Reconstructing the generalized Barrow holographic dark energy with physics-informed neural networks",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/ezdt5b9g8a2yn",
  "venue": "arXiv",
  "versions": []
}