{
  "abstract": "Detection efficiency mismatch is a common problem in realistic quantum key distribution (QKD) systems. Existing security proofs for passive basis choice provide a nonzero secret key rate for small detection efficiency mismatches only. Unfortunately, in realistic setups, the detection efficiency mismatch can be significant. Here, we present a different approach for estimating the secret key rate for the BB84 protocol with passive basis choice and a detection efficiency mismatch between four threshold detectors, where the mismatch is not assumed to be small. We also adapt the decoy-state method for this case. The suggested approach is used to estimate the secret key rate in a QKD experiment between the Micius satellite and the Zvenigorod ground station.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Entropy 2026, 28(11), 1194",
  "arxiv": "2608.09793",
  "author_total": 4,
  "authors": [
    {
      "name": "Egor Ivchenko"
    },
    {
      "name": "Aleksandr Khmelev"
    },
    {
      "name": "Vladimir Kurochkin"
    },
    {
      "name": "Anton Trushechkin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0gseyeeazacpc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.09793",
  "fulltext_url": null,
  "id": "0gseyeeazacpc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.09793",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2608.09793",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0gseyeeazacpc.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T18:21:30Z",
      "native_id": "2608.09793",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.09793"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Security of quantum key distribution with passive basis choice and detection-efficiency mismatch for a realistic satellite setup",
  "title_text": "Security of quantum key distribution with passive basis choice and detection-efficiency mismatch for a realistic satellite setup",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:30Z",
  "url": "https://research.draconitic.com/paper/0gseyeeazacpc",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3390/e28111194",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}