{
  "abstract": "We propose an extension of the cosmological-state construction of Antonini, Sasieta and Swingle (AS$^2$) to three or more holographic CFTs. Each CFT resides on the asymptotic boundary of an AdS page, and all pages are glued along a common interface by imposing the multiway junction conditions. The associated states are prepared by Euclidean evolution with a multilinear insertion. In appropriate heavy insertion limit the bulk geometry develop a closed universe in the center and we refer the state in this limit as a booklet cosmological state. Extending the effective Gaussian assumption used in AS$^2$, we model the three-page insertion by a circular complex Gaussian random tensor, yielding a tripartite Haar state in flat energy windows. In this Gaussian model of the cosmology-to-boundary map, each arm is a network branch associated with one boundary CFT. In the simplest example of three pages with three equal output Hilbert-space dimension $b$, we show that a prescribed code of dimension $K$ is approximately recoverable from any two arms, with vanishing error and high probability as $K/b\\to0$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.02168",
  "author_total": 3,
  "authors": [
    {
      "name": "Jingshu Dai"
    },
    {
      "name": "Binye Dong"
    },
    {
      "name": "Cheng Peng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3gdgpbkwqnfhk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.02168",
  "fulltext_url": null,
  "id": "3gdgpbkwqnfhk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.02168",
  "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",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.02168",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3gdgpbkwqnfhk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:03Z",
      "native_id": "2610.02168",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.02168"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "A baby universe from a large family: booklet cosmology states and quantum error correction",
  "title_text": "A baby universe from a large family: booklet cosmology states and quantum error correction",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:03Z",
  "url": "https://research.draconitic.com/paper/3gdgpbkwqnfhk",
  "venue": "arXiv",
  "versions": []
}