{
  "annotation_id": "a3105b2e-2901-4bc4-a0e3-e295723fd015",
  "date_created": "2026-03-02T18:02:16.990000Z",
  "date_modified": "2026-03-02T18:02:16.990000Z",
  "file_hash": "a936658667e9dffcf30698c40e64a7a35a316afb3dc9e7e9a5cf579f70898df9",
  "private": false,
  "record": {
    "abstract": "We solve the problem of discriminating with minimum error probability two\ngiven Pauli channels. We show that, differently from the case of discrimination\nbetween unitary transformations, the use of entanglement with an ancillary\nsystem can strictly improve the discrimination, and any maximally entangled\nstate allows to achieve the optimal discrimination. We also provide a simple\nnecessary and sufficient condition in terms of the structure of the channels\nfor which the ultimate minimum error probability can be achieved without\nentanglement assistance. When such a condition is satisfied, the optimal input\nstate is simply an eigenstate of one of the Pauli matrices.",
    "arxiv_id": "quant-ph/0506072",
    "authors": [
      "Massimiliano F. Sacchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/7/10/018",
    "journal_ref": "J. Opt. B 7, S333 (2005)",
    "title": "Minimum error discrimination of Pauli channels",
    "url": "https://arxiv.org/abs/quant-ph/0506072"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "52edf8ee-1582-40df-a0b3-9610c4cca671",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}