{
  "annotation_id": "6e821040-d430-4537-ac3d-49f7700ab102",
  "date_created": "2026-03-02T18:01:49.323000Z",
  "date_modified": "2026-03-02T18:01:49.323000Z",
  "file_hash": "41e21a83998cc3cc16e4f9cddec5fd38ca5bd911081905dc5d02b8ac3ccf0bd9",
  "private": false,
  "record": {
    "abstract": "It is known that unambiguous discrimination among non-orthogonal but linearly\nindependent quantum states is possible with a certain probability of success.\nHere, we consider a variant of that problem. Instead of discriminating among\nall of the different states, we shall only discriminate between two subsets of\nthem. In particular, for the case of three non-orthogonal states, we show that\nthe optimal strategy to distinguish between a set containing one of the states\nfrom the set containing the other two has a higher success rate than if we wish\nto discriminate among all three states. Somewhat surprisingly, for unambiguous\ndiscrimination the subsets need not be linearly independent. A fully analytical\nsolution is presented, and we also show how to construct generalized\ninterferometers (multiports) that provide an optical implementation of the\noptimal strategy.",
    "arxiv_id": "quant-ph/0112051",
    "authors": [
      "Yuqing Sun",
      "Janos A. Bergou",
      "Mark Hillery"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.032315",
    "title": "Optimal unambiguous discrimination between subsets of non-orthogonal   quantum states",
    "url": "https://arxiv.org/abs/quant-ph/0112051"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1756c2e9-bc6d-46dd-b2a5-f4f6ad99fbbc",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}