{
  "annotation_id": "e9b69115-771f-4677-b988-8b95cc5987fe",
  "date_created": "2026-03-02T18:02:02.857000Z",
  "date_modified": "2026-03-02T18:02:02.857000Z",
  "file_hash": "6e1f8ef9aaa0bce351a26af21e7161d9bf9d520fe4d46ab1acf172f9dbfe2a14",
  "private": false,
  "record": {
    "abstract": "We report a single-neutron optical experiment to demonstrate the violation of\na Bell-like inequality. Entanglement is achieved not between particles, but\nbetween the degrees of freedom, in this case, for a single-particle. The\nspin-{\\small 1/2} property of neutrons are utilized. The total wave function of\nthe neutron is described in a tensor product Hilbert space. A Bell-like\ninequality is derived not by a non-locality but by a contextuality. Joint\nmeasurements of the spinor and the path properties lead to the violation of a\nBell-like inequality. Manipulation of the wavefunction in one Hilbert space\ninfluences the result of the measurement in the other Hilbert space. A\ndiscussion is given on the quantum contextuality and an entanglement-induced\ncorrelation in our experiment.",
    "arxiv_id": "quant-ph/0311121",
    "authors": [
      "Yuji Hasegawa",
      "Rudolf Loidl",
      "Gerald Badurek",
      "Matthias Baron",
      "Helmut Rauch"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/6/3/002",
    "title": "Violation of a Bell-like Inequality in Neutron Optical Experiments:   Quantum contextuality",
    "url": "https://arxiv.org/abs/quant-ph/0311121"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cafd6831-9638-4153-82f8-d84b1cea261b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}