{
  "abstract": "The feasibility of cost-effective simultaneous quantum and classical communication (SQCC) transmitting both the quantum key and classical information via a superimposed coherent state is investigated both in optical and Terahertz (THz) bands. Since the existing THz SQCC schemes assume single-carrier (SC) transmission over flat fading channels, we embark on investigating SQCC in realistic frequency-selective multipath THz fading channels. We then propose an orthogonal frequency division multiplexing (OFDM) based SQCC system for time-invariant frequency-selective THz scenarios, supported by low-density parity-check coded (LDPC) multidimensional QKD reconciliation schemes. Our simulation results demonstrate that the OFDM-based SQCC scheme is capable of achieving a practical secret key rate (SKR) over a wide range of power sharing scenarios between the classical and quantum signals. By contrast its single-carrier counterpart requires the classical signal to be at least 100 times stronger than the quantum signal in THz SQCC.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.20542",
  "author_total": 7,
  "authors": [
    {
      "name": "Xin Liu"
    },
    {
      "name": "Chao Xu"
    },
    {
      "name": "Soon Xin Ng"
    },
    {
      "name": "Mohammed El-Hajjar"
    },
    {
      "name": "Phuc V. Trinh"
    },
    {
      "name": "Shinya Sugiura"
    },
    {
      "name": "Lajos Hanzo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c7rjjhde3w5yz.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20542",
  "fulltext_url": null,
  "id": "c7rjjhde3w5yz",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20542",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7213577034",
  "pdf_url": "https://arxiv.org/pdf/2609.20542",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c7rjjhde3w5yz.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20542",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20542"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Technical Report OFDM-Assisted Simultaneous Quantum and Classical THz Communications",
  "title_text": "Technical Report OFDM-Assisted Simultaneous Quantum and Classical THz Communications",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/c7rjjhde3w5yz",
  "venue": "arXiv",
  "versions": []
}