{
  "annotation_id": "3ef9f488-356f-4c56-869a-eae98244d7d7",
  "date_created": "2026-03-02T18:01:58.922000Z",
  "date_modified": "2026-03-02T18:01:58.922000Z",
  "file_hash": "c4aaa035ae37f4a238369d7a7b93603d14e52fa9daa442dce0e8d333a10b1b2f",
  "private": false,
  "record": {
    "abstract": "We present reduction theorems for the problem of optimal unambiguous state\ndiscrimination (USD) of two general density matrices. We show that this problem\ncan be reduced to that of two density matrices that have the same rank $n$ and\nare described in a Hilbert space of dimensions $2n$. We also show how to use\nthe reduction theorems to discriminate unambiguously between N mixed states (N\n\\ge 2).",
    "arxiv_id": "quant-ph/0304179",
    "authors": [
      "Philippe Raynal",
      "Norbert L\u00fctkenhaus",
      "Steven J. van Enk"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.022308",
    "journal_ref": "Physical Review A 68, 022308 (2003)",
    "title": "Reduction Theorems for Optimal Unambiguous State Discrimination of   Density Matrices",
    "url": "https://arxiv.org/abs/quant-ph/0304179"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1c2fa16f-acdc-4aa7-971e-ec840283ce63",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}