{
  "abstract": "Finite rate randomness expansion (RE) which is secure against quantum adversaries is a crucial information processing task which is well studied in the case of two non-communicating parties sharing Bell non-local correlations in a device independent manner. In this paper we show that contextual correlations with only a single localized party are sufficient for RE in a semi-device independent (SDI) manner. We propose a template SDI-RE protocol which is applicable for arbitrary $N$-cycle non-contextuality (NC) inequalities and derive its RE rate under finite statistics. As a special case, we also highlight the advantages of the situation when RE is constrained by Clauser-Horne-Shimony-Holt (CHSH) inequality but with characterized measurements implemented by only a single party. Our template protocol also incorporates non-ideal statistics which may not satisfy perfect commutativity and perfect repeatability, both of which are necessary in a loophole-free test of NC inequalities. As such, several recent experimental implementations of significantly loophole-free tests of NC inequalities can be modified for secure RE following our approach.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.21765",
  "author_total": 3,
  "authors": [
    {
      "name": "Dhananjoy Ghosh"
    },
    {
      "name": "Nandana J"
    },
    {
      "name": "Jaskaran Singh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5j10bwjkj89nr.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.21765",
  "fulltext_url": null,
  "id": "5j10bwjkj89nr",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.21765",
  "language": null,
  "licence": "CC-BY-SA-4.0",
  "licence_label": "CC BY-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7222439654",
  "pdf_url": "https://arxiv.org/pdf/2610.21765",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5j10bwjkj89nr.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.21765",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.21765"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Local finite rate semi device independent randomness expansion from quantum contextuality",
  "title_text": "Local finite rate semi device independent randomness expansion from quantum contextuality",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/5j10bwjkj89nr",
  "venue": "arXiv",
  "versions": []
}