{
  "abstract": "We confront a class of dark-energy equations of state emerging from group field theory (GFT) quantum gravity with DESI Data Release 2 baryon acoustic oscillations and Pantheon+ type-Ia supernovae. We introduce sampling parametrisations that replace microscopic initial-condition parameters by combinations more directly measured by background probes. The GFT solutions separate into logarithmic, power-law and oscillatory branches, determined by the microscopic interaction parameter $m$. The logarithmic branch is constrained to lie extremely close to a cosmological constant, while the power-law branch permits a small phantom deviation. Without perturbative-theory priors, oscillatory solutions can reproduce the mild preference of the distance data for a dip in $w(z)$ near $z\\simeq0.5$--$1$. Profile-likelihood constraints favour $m\\sim-2$ and $m\\sim-5$ from BAO and supernovae, shifting towards $m\\sim-3.5$ when CMB information is included. Conservative perturbative priors strongly suppress these deviations from $Λ$CDM. The quantum-gravity scale $z_q$, related to the average number of quantum gravity atoms, remains unconstrained, although its role in the time evolution makes higher-redshift observations a promising route to probing it. We further find that strong projection effects highlight the importance of performing likelihood profiling alongside our marginal posterior constraints. Our results provide a first direct test of GFT-motivated dynamical dark energy and demonstrate the potential for cosmological observations to inform quantum-gravity model building.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.15969",
  "author_total": 4,
  "authors": [
    {
      "name": "M. Tsedrik"
    },
    {
      "name": "B. Bose"
    },
    {
      "name": "L. Marchetti"
    },
    {
      "name": "E. Ferreira"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0nc7qm0d2t4p0.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.15969",
  "fulltext_url": null,
  "id": "0nc7qm0d2t4p0",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.15969",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7213302545",
  "pdf_url": "https://arxiv.org/pdf/2609.15969",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0nc7qm0d2t4p0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.15969",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.15969"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Constraining quantum-gravity predictions for evolving dark energy",
  "title_text": "Constraining quantum-gravity predictions for evolving dark energy",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/0nc7qm0d2t4p0",
  "venue": "arXiv",
  "versions": []
}