{
  "annotation_id": "d6bf56fb-6aad-4543-a8ac-9143897ae83e",
  "date_created": "2026-03-02T18:02:03.355000Z",
  "date_modified": "2026-03-02T18:02:03.355000Z",
  "file_hash": "652aaa2b07044e0d0f0b79991b634b3733bd378435ea29c2158e66897553eed4",
  "private": false,
  "record": {
    "abstract": "We report the first measurement of the quantum phase-difference noise of an\nultrastable nondegenerate optical parametric oscillator that emits twin beams\nclassically phase-locked at exact frequency degeneracy. The measurement\nillustrates the property of a lossless balanced beam-splitter to convert\nnumber-difference squeezing into phase-difference squeezing and, thus, provides\nindirect evidence for Heisenberg-limited interferometry using twin beams. This\nexperiment is a generalization of the Hong-Ou-Mandel interference effect for\ncontinuous variables and constitutes a milestone towards continuous-variable\nentanglement of bright, ultrastable nondegenerate beams.",
    "arxiv_id": "quant-ph/0310002",
    "authors": [
      "Sheng Feng",
      "Olivier Pfister"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.203601",
    "journal_ref": "Phys. Rev. Lett. 92, 203601 (2004)",
    "title": "Quantum interference of ultrastable twin optical beams",
    "url": "https://arxiv.org/abs/quant-ph/0310002"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0aa16ed5-97de-464c-b27b-a845f05dc984",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}