{
  "annotation_id": "e5445016-9a15-4b52-8bc5-8c2cc3c393c4",
  "date_created": "2026-03-02T18:02:31.240000Z",
  "date_modified": "2026-03-02T18:02:31.240000Z",
  "file_hash": "9a16ea944ea65f5f88cbd30954936073d3e1c0560efa6f9407ed3f613ac59823",
  "private": false,
  "record": {
    "abstract": "We investigate entanglement in the above-threshold Optical Parametric\nOscillator, both theoretically and experimentally, and discuss its potential\napplications to quantum information. The fluctuations measured in the\nsubtraction of signal and idler amplitude quadratures are $\\Delta^2 \\hat\np_-=0.50(1)$, or $-3.01(9)$ dB, and in the sum of phase quadratures are\n$\\Delta^2 \\hatq_+=0.73(1)$, or $-1.37(6)$ dB. A detailed experimental study of\nthe noise behavior as a function of pump power is presented, and discrepancies\nwith theory are discussed.",
    "arxiv_id": "quant-ph/0610208",
    "authors": [
      "Alessandro S. Villar",
      "Katiuscia N. Cassemiro",
      "Kaled Dechoum",
      "Antonio Z. Khoury",
      "Marcelo Martinelli",
      "Paulo Nussenzveig"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/JOSAB.24.000249",
    "title": "Entanglement in the above-threshold optical parametric oscillator",
    "url": "https://arxiv.org/abs/quant-ph/0610208"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "357930ce-55be-4216-a593-baaf9c73d265",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}