{
  "annotation_id": "5859c401-71c2-499c-b4d6-e1bbe22ecc86",
  "date_created": "2026-03-02T18:02:02.264000Z",
  "date_modified": "2026-03-02T18:02:02.264000Z",
  "file_hash": "3837f62a6be616ca81a9cf5145f9e6d57607bf2907c40fb6a49b06b0bef38749",
  "private": false,
  "record": {
    "abstract": "We present an experimental analysis of quadrature entanglement produced from\na pair of amplitude squeezed beams. The correlation matrix of the state is\ncharacterized within a set of reasonable assumptions, and the strength of the\nentanglement is gauged using measures of the degree of inseparability and the\ndegree of EPR paradox. We introduce controlled decoherence in the form of\noptical loss to the entangled state, and demonstrate qualitative differences in\nthe response of the degrees of inseparability and EPR paradox to this loss. The\nentanglement is represented on a photon number diagram that provides an\nintuitive and physically relevant description of the state. We calculate\nefficacy contours for several quantum information protocols on this diagram,\nand use them to predict the effectiveness of our entanglement in those\nprotocols.",
    "arxiv_id": "quant-ph/0309013",
    "authors": [
      "W. P. Bowen",
      "R. Schnabel",
      "P. K. Lam",
      "T. C. Ralph"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.012304",
    "journal_ref": "Phys. Rev. A 69, 012304 (2004)",
    "title": "A characterization of continuous variable entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0309013"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3bf30881-e269-4fca-9994-db8b3e4cce61",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}