{
  "annotation_id": "bd74631f-de5c-47ef-ace4-ecd360cea9c1",
  "date_created": "2026-03-02T18:01:49.078000Z",
  "date_modified": "2026-03-02T18:01:49.078000Z",
  "file_hash": "14383a90fcbfaaf2c4ae8f9000210cca48ed2716f584013e0b78ba857c6d9658",
  "private": false,
  "record": {
    "abstract": "We show that for the tensor product of an entanglement-breaking quantum\nchannel with an arbitrary quantum channel, both the minimum entropy of an\noutput of the channel and the Holevo-Schumacher-Westmoreland capacity are\nadditive. In addition, for the tensor product of two arbitrary quantum\nchannels, we give a bound involving entanglement of formation for the amount of\nsubadditivity (for minimum entropy output) or superadditivity (for channel\ncapacity) that can occur.",
    "arxiv_id": "quant-ph/0201149",
    "authors": [
      "Peter W. Shor"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1063/1.1498000",
    "journal_ref": "J. Math. Phys. Vol. 43, 4334-4340 (2002)",
    "title": "Additivity of the Classical Capacity of Entanglement-Breaking Quantum   Channels",
    "url": "https://arxiv.org/abs/quant-ph/0201149"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5a6fe223-dd32-4b20-a16f-77ff88ac157b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}