{
  "annotation_id": "a441f259-d258-486f-889e-93987b982a85",
  "date_created": "2026-03-02T18:01:45.841000Z",
  "date_modified": "2026-03-02T18:01:45.841000Z",
  "file_hash": "9d42257517f1796b64134d6aadb2e54d4525842143521b0e5b7bc60410ae5f8d",
  "private": false,
  "record": {
    "abstract": "We analyze the problem of sending, in a single transmission, the information\nrequired to specify an orthogonal trihedron or reference frame through a\nquantum channel made out of N elementary spins. We analytically obtain the\noptimal strategy, i.e., the best encoding state and the best measurement. For\nlarge N, we show that the average error goes to zero linearly in 1/N. Finally,\nwe discus the construction of finite optimal measurements.",
    "arxiv_id": "quant-ph/0106014",
    "authors": [
      "E. Bagan",
      "M. Baig",
      "R. Munoz-Tapia"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.257903",
    "journal_ref": "Phys. Rev. Lett. 87, 257903 (2001)",
    "title": "Aligning Reference Frames Using Quantum States",
    "url": "https://arxiv.org/abs/quant-ph/0106014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a9ed0aab-1caf-4658-8723-9c0879c17c65",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}