{
  "annotation_id": "c1f55560-4c8e-4129-a6d1-3bd4bdf841f7",
  "date_created": "2026-03-02T18:02:06.511000Z",
  "date_modified": "2026-03-02T18:02:06.511000Z",
  "file_hash": "8a3152ef26f376498c1cb27afd5c0d4ab144df8b0ee41495d22ae442cffa933a",
  "private": false,
  "record": {
    "abstract": "We give a direct proof of the additivity of the minimum output entropy of a\nparticular quantum channel which breaks the multiplicativity conjecture. This\nyields additivity of the classical capacity of this channel, a result obtained\nby a different method by Matsumoto and Yura [quant-ph/0306009]. Our proof\nrelies heavily upon certain concavity properties of the output entropy which\nare of independent interest.",
    "arxiv_id": "quant-ph/0403072",
    "authors": [
      "Nilanjana Datta",
      "Alexander S. Holevo",
      "Yuri M. Suhov"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "A quantum channel with additive minimum output entropy",
    "url": "https://arxiv.org/abs/quant-ph/0403072"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7ebf9d2f-c5b2-4bde-8de9-e660378629c6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}