{
  "annotation_id": "82942677-68c6-4535-be6c-75f1f98f6893",
  "date_created": "2026-03-02T18:02:02.857000Z",
  "date_modified": "2026-03-02T18:02:02.857000Z",
  "file_hash": "bf1b36808fe4b5a9ad62958c46c69248fed191c5d68551d7f1edc2bc045aedf9",
  "private": false,
  "record": {
    "abstract": "We demonstrate the possibility of surpassing the quantum noise limit for\nsimultaneous multi-axis spatial displacement measurements that have zero mean\nvalues. The requisite resources for these measurements are squeezed light beams\nwith exotic transverse mode profiles. We show that, in principle, lossless\ncombination of these modes can be achieved using the non-degenerate Gouy phase\nshift of optical resonators. When the combined squeezed beams are measured with\nquadrant detectors, we experimentally demonstrate a simultaneous reduction in\nthe transverse x- and y- displacement fluctuations of 2.2 dB and 3.1 dB below\nthe quantum noise limit.",
    "arxiv_id": "quant-ph/0311122",
    "authors": [
      "N. Treps",
      "N. Grosse",
      "W. P. Bowen",
      "M. T. L. Hsu",
      "A. Maitre",
      "C. Fabre",
      "H. -A. Bachor",
      "P. K. Lam"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1464-4266/6/8/007",
    "journal_ref": "J. Opt. B: Quantum Semiclass. Opt. 6 (2004) S664-S674",
    "title": "Nano-displacement measurements using spatially multimode squeezed light",
    "url": "https://arxiv.org/abs/quant-ph/0311122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f6ecd8ed-7806-4635-b5bb-ca21c2478b92",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}