{
  "abstract": "Multiplexing and photonic-electronic integration offer a route to scalable and high-throughput quantum key distribution (QKD) networks through parallel transmission and compact hardware suited to volume manufacturing. Realizing this route requires multichannel transmitters and receivers, and a security analysis accounting for mode coupling. Here we present a CMOS-compatible photonic-electronic multimode continuous-variable QKD architecture, using polarization multiplexing as a two-mode example. Silicon-photonic transmitter and receiver chips prepare and detect two polarization modes in parallel. The receiver is co-integrated with a dual-channel 28-nm CMOS transimpedance amplifier, providing shot-noise clearances exceeding 20 dB in both channels. Pilot-assisted unitary digital recovery removes the need for active optical polarization control, while a multimode security analysis accounts for the mode crosstalk. At 2 percent residual crosstalk, the multimode analysis extends the simulated secure distance from 39 to 84 km, near the crosstalk-free limit of 89 km. Over 10 km of deployed fibre, the mean total finite-size secret-key rate estimate is 6.69 Mbit/s, 12 percent above the single-mode analysis from the same digitally recovered data. These results establish a route to scalable multimode quantum-secured networks built on technology suited to mass production.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.35410",
  "author_total": 14,
  "authors": [
    {
      "name": "Yiming Bian"
    },
    {
      "name": "Sarah Bastiaens"
    },
    {
      "name": "Saeed Hakimi"
    },
    {
      "name": "Huy Quang Nguyen"
    },
    {
      "name": "Aboobackkar Sidhique"
    },
    {
      "name": "Cédric Bruynsteen"
    },
    {
      "name": "Govind J. Wanjalkar"
    },
    {
      "name": "Ali Al Hadi Amhaz"
    },
    {
      "name": "Jasper Jans"
    },
    {
      "name": "Axl Bomhals"
    },
    {
      "name": "Ulrik L. Andersen"
    },
    {
      "name": "Tobias Gehring"
    },
    {
      "name": "Xin Yin"
    },
    {
      "name": "Adnan A. E. Hajomer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5n648ce0xt9af.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.35410",
  "fulltext_url": null,
  "id": "5n648ce0xt9af",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.35410",
  "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",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7223896274",
  "pdf_url": "https://arxiv.org/pdf/2610.35410",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5n648ce0xt9af.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.35410",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.35410"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Multimode continuous-variable quantum key distribution with CMOS-compatible photonic-electronic integration",
  "title_text": "Multimode continuous-variable quantum key distribution with CMOS-compatible photonic-electronic integration",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/5n648ce0xt9af",
  "venue": "arXiv",
  "versions": []
}