{
  "abstract": "We constrain the deformation parameter $β$ of the Generalized Uncertainty Principle with cosmological observations. A quadratic deformation of the Heisenberg uncertainty principle modifies the Friedmann equations of $Λ$CDM and gives rise to a phenomenological dynamical dark energy with a single free parameter, $β$. To avoid a singular behaviour for the effective dark energy equation of state parameter, we restrict the prior to non-negative values of $β$. Using Planck 2018 CMB temperature and polarization data together with DESI DR2 BAO and Pantheon+SH0ES supernovae, we find the upper limit $β<0.00728~$ at $68\\%$ confidence interval. The resulting cosmological model fits the data slightly better than $Λ$CDM, providing smaller value for the $χ_{min}^{2}% $, such that the Akaike Information Criterion to suggest statistical equivalency between the two models, although the Bayesian evidence favours the $Λ$CDM. Finally, the quadratic Generalized Uncertainty Principle does not alleviate the $H_{0}$ tension, it reduces the tension to $4.8σ$, that is, due to the small correlation between the $H_{0}-β$ parameters.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.28664",
  "author_total": 1,
  "authors": [
    {
      "name": "Andronikos Paliathanasis"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/91z1pt1gzd15z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.28664",
  "fulltext_url": null,
  "id": "91z1pt1gzd15z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.28664",
  "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": "W7223233333",
  "pdf_url": "https://arxiv.org/pdf/2610.28664",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/91z1pt1gzd15z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:18Z",
      "native_id": "2610.28664",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.28664"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "openalex:3103|Cosmology and Gravitation Theories",
      "subfield": "cosmology"
    }
  ],
  "title": "Cosmological Bounds on the Generalized Uncertainty Principle from the CMB",
  "title_text": "Cosmological Bounds on the Generalized Uncertainty Principle from the CMB",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:18Z",
  "url": "https://research.draconitic.com/paper/91z1pt1gzd15z",
  "venue": "arXiv",
  "versions": []
}