{
  "annotation_id": "21c414fd-228d-494b-aabd-7ed3c5c7d5da",
  "date_created": "2026-03-02T18:02:06.882000Z",
  "date_modified": "2026-03-02T18:02:06.882000Z",
  "file_hash": "f260538ba59004e21bec80677a967e3d3172841c6a421c4f0ff6ca85c66f848b",
  "private": false,
  "record": {
    "abstract": "We report the experimental demonstration of a heterodyne polarization\nrotation measurement with a noise floor 4.8 dB below the optical shot noise, by\nuse of the classically phase-locked quantum twin beams emitted above threshold\nby an ultrastable type-II Na:KTP CW optical parametric oscillator. We believe\nthis is the largest noise reduction achieved to date on optical\nphase-difference measurements.",
    "arxiv_id": "quant-ph/0406031",
    "authors": [
      "Sheng Feng",
      "Olivier Pfister"
    ],
    "categories": [
      "quant-ph",
      "physics.optics"
    ],
    "doi": "10.1364/OL.29.002800",
    "journal_ref": "Opt. Lett. 29, 2800 (2004)",
    "title": "Sub-shot-noise heterodyne polarimetry",
    "url": "https://arxiv.org/abs/quant-ph/0406031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2a7c9092-97fe-469e-89b7-d209bb3fe134",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}