{
  "annotation_id": "7968a673-b074-4e3a-b776-caf6f1d0896a",
  "date_created": "2026-03-02T18:02:31.187000Z",
  "date_modified": "2026-03-02T18:02:31.187000Z",
  "file_hash": "668cd11d8fcef479d2890ab87ecc7ad329e28a42e461abbac5920023d88fb9d7",
  "private": false,
  "record": {
    "abstract": "In this paper, we discuss the problem of determining whether a quantum system\nis in a pure state, or in a mixed state. We apply two strategies to settle this\nproblem: the unambiguous discrimination and the maximum confidence\ndiscrimination. We also proved that the optimal versions of both strategies are\nequivalent. The efficiency of the discrimination is also analyzed. This scheme\nalso provides a method to estimate purity of quantum states, and Schmidt\nnumbers of composed systems.",
    "arxiv_id": "quant-ph/0611122",
    "authors": [
      "Chi Zhang",
      "Guoming Wang",
      "Mingsheng Ying"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.062306",
    "title": "Discrimination between pure states and mixed states",
    "url": "https://arxiv.org/abs/quant-ph/0611122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5de952eb-d351-45bf-8180-77b97a9a1878",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}