{
  "annotation_id": "f0803970-e5f8-4b1f-bd1c-457d4847ec38",
  "date_created": "2026-03-02T18:01:45.330000Z",
  "date_modified": "2026-03-02T18:01:45.330000Z",
  "file_hash": "5bf5fc74d9e5ff599db7f8d88772b50206b21fa4fc7db3ec99c94fa2fe8540a5",
  "private": false,
  "record": {
    "abstract": "We demonstrate a class of optimum detection strategies for extracting the\nmaximum information from sets of equiprobable real symmetric qubit states of a\nsingle photon. These optimum strategies have been predicted by Sasaki et al.\n[Phys. Rev. A{\\bf 59}, 3325 (1999)]. The peculiar aspect is that the detections\nwith at least three outputs suffice for optimum extraction of information\nregardless of the number of signal elements. The cases of ternary (or trine),\nquinary, and septenary polarization signals are studied where a standard von\nNeumann detection (a projection onto a binary orthogonal basis) fails to access\nthe maximum information. Our experiments demonstrate that it is possible with\npresent technologies to attain about 96% of the theoretical limit.",
    "arxiv_id": "quant-ph/0106164",
    "authors": [
      "Jun Mizuno",
      "Mikio Fujiwara",
      "Makoto Akiba",
      "Tetsuya Kawanishi",
      "Stephen M. Barnett",
      "Masahide Sasaki"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.012315",
    "journal_ref": "PHYSICAL REVIEW A, VOLUME 65, 012315 (2001)",
    "title": "Optimum detection for extracting maximum information from symmetric   qubit sets",
    "url": "https://arxiv.org/abs/quant-ph/0106164"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ec59796a-03a2-46bf-9cb8-47b0ca54d26c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}