{
  "abstract": "A bstract : This paper corroborates a statement that perturbative string theory does not admit a solution whose spacetime metric is de Sitter times a closed manifold, to all orders in the α ′ and g s expansions, under the assumption that the logarithm of the sphere partition function of Euclidean quantum gravity receives a nonzero contribution proportional to $$ \\frac{1}{G_N} $$ 1 G N in a saddle-point approximation. This assumption is related to the Gibbons-Hawking proposal that the entropy of the cosmological horizon of the static patch is $$ \\frac{A}{4{G}_N} $$ A 4 G N . Evidence for the statement comes from independent approaches to the effective action of string theory, all of which agree that the tree-level action vanishes for closed Euclidean target-space solutions. One possible implication is that the state of the Universe will depart from an asymptotically de Sitter spacetime.",
  "abstract_shown": true,
  "affiliations": [
    "Tel Aviv University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Yoav Zigdon",
      "orcid": "0000-0002-1643-6234"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3k2jx05nzt01p.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep10(2026)081",
  "fulltext_url": null,
  "id": "3k2jx05nzt01p",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/10.1007/JHEP10(2026)081",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7157864637",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)081.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/3k2jx05nzt01p.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "10.1007/jhep10(2026)081",
      "source": "crossref",
      "url": "https://link.springer.com/10.1007/JHEP10(2026)081"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Black Holes and Theoretical Physics",
      "subfield": "high-energy"
    }
  ],
  "title": "De Sitter in string theory vs. Gibbons & Hawking",
  "title_text": "De Sitter in string theory vs. Gibbons & Hawking",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:01Z",
  "url": "https://research.draconitic.com/paper/3k2jx05nzt01p",
  "venue": "Journal of High Energy Physics",
  "versions": []
}