{
  "annotation_id": "449da104-7251-4158-af5f-7785821db924",
  "date_created": "2026-03-02T18:02:22.880000Z",
  "date_modified": "2026-03-02T18:02:22.880000Z",
  "file_hash": "b08a43479473aedf5af8a5f636cd31d3de1e9e69642511d6aa297f0ffcaead3f",
  "private": false,
  "record": {
    "abstract": "We find a regularized formula for the entanglement-assisted (EA) capacity\nregion for quantum multiple access channels (QMAC). We illustrate the capacity\nregion calculation with the example of the collective phase-flip channel which\nadmits a single-letter characterization. On the way, we provide a\nfirst-principles proof of the EA coding theorem based on a packing argument. We\nobserve that the Holevo-Schumacher-Westmoreland theorem may be obtained from a\nmodification of our EA protocol. We remark on the existence of a family\nhierarchy of protocols for multiparty scenarios with a single receiver, in\nanalogy to the two-party case. In this way, we relate several previous results\nregarding QMACs.",
    "arxiv_id": "quant-ph/0511228",
    "authors": [
      "Min-Hsiu Hsieh",
      "Igor Devetak",
      "Andreas Winter"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1109/TIT.2008.924726",
    "journal_ref": "IEEE Transaction on Information Theory, vol. 54, Issue 7, pp.\n  3078-3090, Jul. 2008",
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Entanglement-Assisted Capacity of Quantum Multiple-Access Channels",
    "url": "https://arxiv.org/abs/quant-ph/0511228"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c0f9b773-f3e2-43e5-a6b4-49fd8030596f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}