{
  "annotation_id": "e7a34ec1-251b-4d64-b7ae-30eb387e6049",
  "date_created": "2026-03-02T18:01:53.048000Z",
  "date_modified": "2026-03-02T18:01:53.048000Z",
  "file_hash": "710f1da4633a146b091241fa3829505a527135d3164b3cbe262c9826abba8c06",
  "private": false,
  "record": {
    "abstract": "We generate a pair of entangled beams from the interference of two amplitude\nsqueezed beams. The entanglement is quantified in terms of EPR-paradox [Reid88]\nand inseparability [Duan00] criteria, with observed results of $\\Delta^{2}\nX_{x|y}^{+} \\Delta^{2} X_{x|y}^{-} = 0.58 \\pm 0.02$ and $\\sqrt{\\Delta^{2} X_{x\n\\pm y}^{+} \\Delta^{2} X_{x \\pm y}^{-}} =\n  0.44 \\pm 0.01$, respectively. Both results clearly beat the standard quantum\nlimit of unity. We experimentally analyze the effect of decoherence on each\ncriterion and demonstrate qualitative differences. We also characterize the\nnumber of required and excess photons present in the entangled beams and\nprovide contour plots of the efficacy of quantum information protocols in terms\nof these variables.",
    "arxiv_id": "quant-ph/0209001",
    "authors": [
      "W. P. Bowen",
      "R. Schnabel",
      "P. K. Lam",
      "T. C. Ralph"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.90.043601",
    "journal_ref": "Phys. Rev. Lett. 90, 043601 (2003)",
    "title": "An experimental investigation of criteria for continuous variable   entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0209001"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "96ed7f35-313c-4c54-8c81-8d9d0fcd45f0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}