{
  "annotation_id": "de47c0bf-30f0-4a5a-8280-03abeeda9adc",
  "date_created": "2026-03-02T18:02:17.213000Z",
  "date_modified": "2026-03-02T18:02:17.213000Z",
  "file_hash": "1e315ca459f6c7b4cb6bde891dbec50905f64dea7eac8bd1f7b7e353dd14a318",
  "private": false,
  "record": {
    "abstract": "We show that it is possible to define a Lorentz-covariant reduced spin\ndensity matrix for massive particles. Such a matrix allows one to calculate the\nmean values of observables connected with spin measurements (average\npolarizations). Moreover, it contains not only information about polarization\nof the particle but also information about its average kinematical state. We\nalso use our formalism to calculate the correlation function in the\nEinstein--Podolsky--Rosen--Bohm type experiment with massive relativistic\nparticles.",
    "arxiv_id": "quant-ph/0507056",
    "authors": [
      "P. Caban",
      "J. Rembielinski"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.012103",
    "journal_ref": "Phys. Rev. A 72, 012103 (2005)",
    "title": "Lorentz-covariant reduced spin density matrix and EPR-Bohm correlations",
    "url": "https://arxiv.org/abs/quant-ph/0507056"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "857d812e-33b0-42c5-997b-99962818dd59",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}