{
  "abstract": "We determine the two-way quantum and secret-key capacities of the pure-loss channel under an average input photon-number constraint. For transmissivity $η$ and photon budget $N$, both capacities equal $g(N)-g((1-η)N)$, where $g$ is the entropy of a thermal state. This coincides with the rate achieved by the known reverse coherent information of a two-mode squeezed vacuum. Our result provides the last missing capacity formula for the celebrated pure-loss channel, completing the picture of bosonic quantum communication under pure loss.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.12365",
  "author_total": 4,
  "authors": [
    {
      "name": "Alessandro Falco"
    },
    {
      "name": "Francesco Anna Mele"
    },
    {
      "name": "Ludovico Lami"
    },
    {
      "name": "Vittorio Giovannetti"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/92v5e50gw6qbg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.12365",
  "fulltext_url": null,
  "id": "92v5e50gw6qbg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.12365",
  "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": "W7221170644",
  "pdf_url": "https://arxiv.org/pdf/2610.12365",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/92v5e50gw6qbg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:54Z",
      "native_id": "2610.12365",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.12365"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Energy-constrained two-way capacities of the pure-loss channel",
  "title_text": "Energy-constrained two-way capacities of the pure-loss channel",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:54Z",
  "url": "https://research.draconitic.com/paper/92v5e50gw6qbg",
  "venue": "arXiv",
  "versions": []
}