{
  "annotation_id": "68a1079f-596f-424c-ae31-4cbbba19763e",
  "date_created": "2026-03-02T18:01:48.534000Z",
  "date_modified": "2026-03-02T18:01:48.534000Z",
  "file_hash": "ca6b7e5aceafc4b53300b70ca1064dc1042b09121db8b00364dace92ba55e2f7",
  "private": false,
  "record": {
    "abstract": "We suggest a quantum measurement model in an ion trap which specifies the\nprobability distribution of two, distinct internal ground states of a trapped\nfour-level ion. The external degrees of motion of the four-level ion constitute\nthe meter which, in turn, is coupled to the environment by engineered\nreservoirs. In a previous publication, a similar measurement model was employed\nto test decoherence effects on quantum nonlocality in phase space on the basis\nof coincidence measurements of the entangled system-meter scheme. Here, we\nstudy the effects of decoherence on the entanglement of formation characterized\nby the concurrence. The concurrence of the system enables to find the maximum\npossible violation of the Bell inequality. Surprisingly, this model gives\nillustrative insights into the question to what extend the Bell inequality can\nbe considered as a measure of entanglement.",
    "arxiv_id": "quant-ph/0204054",
    "authors": [
      "Matthias Jakob",
      "Yonatan Abranyos",
      "Janos A. Bergou"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.022113",
    "journal_ref": "Phys. Rev. A, 66 (2002) 022113",
    "title": "Degree of entanglement in a quantum measurement process",
    "url": "https://arxiv.org/abs/quant-ph/0204054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fbca9b3e-bffb-459b-986c-679b8d79c0c1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}