{
  "annotation_id": "7ee6cc4b-59ad-47f1-aa04-07a0e99e6a30",
  "date_created": "2026-03-02T18:02:37.115000Z",
  "date_modified": "2026-03-02T18:02:37.115000Z",
  "file_hash": "9d9ee28d028bda6315ec8f0167980b3feb88cd4c127e61aaf96cb1b95276dac6",
  "private": false,
  "record": {
    "abstract": "This paper investigates properties of noisy quantum information channels. We\ndefine a new quantity called {\\em coherent information} which measures the\namount of quantum information conveyed in the noisy channel. This quantity can\nnever be increased by quantum information processing, and it yields a simple\nnecessary and sufficient condition for the existence of perfect quantum error\ncorrection.",
    "arxiv_id": "quant-ph/9604022",
    "authors": [
      "Benjamin Schumacher",
      "M. A. Nielsen"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.54.2629",
    "title": "Quantum data processing and error correction",
    "url": "https://arxiv.org/abs/quant-ph/9604022"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6bfefa13-9e6e-4561-8541-a9389a31d538",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}