{
  "annotation_id": "9c2d7469-3cb4-4ba0-b6bc-37a66b542051",
  "date_created": "2026-03-02T18:02:26.463000Z",
  "date_modified": "2026-03-02T18:02:26.463000Z",
  "file_hash": "6ad27b0053ded9f3318b059a649c8c0efd8e7683a5bbab36b663d84012e83a63",
  "private": false,
  "record": {
    "abstract": "The notion of weak-degradability of quantum channels is introduced by\ngeneralizing the degradability definition given by Devetak and Shor. Exploiting\nthe unitary equivalence with beam-splitter/amplifier channels we then prove\nthat a large class of one-mode Bosonic Gaussian channels are either weakly\ndegradable or anti-degradable. In the latter case this implies that their\nquantum capacity Q is null. In the former case instead, this allows us to\nestablish the additivity of the coherent information for those maps which admit\nunitary representation with single-mode pure environment.",
    "arxiv_id": "quant-ph/0603257",
    "authors": [
      "Filippo Caruso",
      "Vittorio Giovannetti"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.other",
      "physics.optics"
    ],
    "doi": "10.1103/PhysRevA.74.062307",
    "journal_ref": "Physical Review A 74, 062307 (2006)",
    "title": "Degradability of Bosonic Gaussian channels",
    "url": "https://arxiv.org/abs/quant-ph/0603257"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9bc29197-4e15-4f3f-8233-245f06dc5c2c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}