{
  "annotation_id": "571e5ffd-e1b1-45f9-9b3c-584fc009d189",
  "date_created": "2026-03-02T18:02:10.246000Z",
  "date_modified": "2026-03-02T18:02:10.246000Z",
  "file_hash": "9f6408cc17ff2458cb4adedc690ded4284ba5aaee1cc204bcef547f3ffc45ff1",
  "private": false,
  "record": {
    "abstract": "In several recent papers on entanglement in relativistic quantum systems and\nrelativistic Bell\u0027s inequalities, relativistic Bell-type two-particle states\nhave been constructed in analogy to non-relativistic states. These\nconstructions do not have the form suggested by relativistic invariance of the\ndynamics. Two relativistic formulations of Bell-type states are shown for\nmassive particles, one using the standard Wigner spin basis and one using the\nhelicity basis. The construction hinges on the use of Clebsch-Gordan\ncoefficients of the Poincar\\\u0027e group to reduce the direct product of two\nunitary irreducible representations (UIRs) into a direct sum of UIRs.",
    "arxiv_id": "quant-ph/0409204",
    "authors": [
      "N. L. Harshman"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.022312",
    "journal_ref": "Phys. Rev. A 71, 022312 (2005)",
    "title": "Basis States for Relativistic, Dynamically-Entangled Particles",
    "url": "https://arxiv.org/abs/quant-ph/0409204"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "55b364b8-8278-44b8-907c-fb6af8ecf784",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}