{
  "annotation_id": "22d3a0c6-ab66-4dcd-b992-0ec7c6b30a36",
  "date_created": "2026-03-02T18:01:41.570000Z",
  "date_modified": "2026-03-02T18:01:41.570000Z",
  "file_hash": "dbbc47754798efa7f3aba76cbab76e1d85801cf7dd29c21b9548fac798086c5f",
  "private": false,
  "record": {
    "abstract": "We demonstrate suppression and enhancement of spontaneous parametric down-\nconversion via quantum interference with two weak fields from a local\noscillator (LO). Pairs of LO photons are observed to upconvert with high\nefficiency for appropriate phase settings, exhibiting an effective nonlinearity\nenhanced by at least 10 orders of magnitude. This constitutes a two-photon\nswitch, and promises to be useful for a variety of nonlinear optical effects at\nthe quantum level.",
    "arxiv_id": "quant-ph/0101020",
    "authors": [
      "K. J. Resch",
      "J. S. Lundeen",
      "A. M. Steinberg"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.87.123603",
    "journal_ref": "Physical Review Letters 87, 123603 (2001).",
    "title": "Nonlinear optics with less than one photon",
    "url": "https://arxiv.org/abs/quant-ph/0101020"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d845c000-264b-4a92-ac0f-f5c79aef3210",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}