{
  "annotation_id": "c7a9317a-b39a-4881-8799-d43c7b435f67",
  "date_created": "2026-03-02T18:01:59.757000Z",
  "date_modified": "2026-03-02T18:01:59.757000Z",
  "file_hash": "cabec21af7fa69a29ac05d882e70f6aae239559147da4ac3bccdf5144f6728cb",
  "private": false,
  "record": {
    "abstract": "For quantum communication in a gravitational field, the properties of the\nEinstein-Podolsky-Rosen (EPR) correlation are studied within the framework of\ngeneral relativity. Acceleration and gravity are shown to deteriorate the\nperfect anti-correlation of an EPR pair of spins in the same direction, and\napparently decrease the degree of the violation of Bell\u0027s inequality. To\nmaintain the perfect EPR correlation and the maximal violation of Bell\u0027s\ninequality, observers must measure the spins in appropriately chosen different\ndirections. Which directions are appropriate depends on the velocity of the\nparticles, the curvature of the spacetime, and the positions of the observers.\nNear the event horizon of a black hole, the appropriate directions depend so\nsensitively on the positions of the observers that even a very small\nuncertainty in the identification of the observers\u0027 positions leads to a fatal\nerror in quantum communication, unless the observers fall into the black hole\ntogether with the particles.",
    "arxiv_id": "quant-ph/0307114",
    "authors": [
      "Hiroaki Terashima",
      "Masahito Ueda"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.032113",
    "journal_ref": "Phys.Rev. A69 (2004) 032113",
    "title": "Einstein-Podolsky-Rosen correlation in gravitational field",
    "url": "https://arxiv.org/abs/quant-ph/0307114"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7ae0c68a-f00a-43a9-8598-d2e96a7507fa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}