{
  "annotation_id": "d59b24aa-f756-4136-9666-38347e401f65",
  "date_created": "2026-03-02T18:02:41.410000Z",
  "date_modified": "2026-03-02T18:02:41.410000Z",
  "file_hash": "2e4817656511e40410580f7aef96e8472f0bb4ead6227d360b5824bc801d2c89",
  "private": false,
  "record": {
    "abstract": "The phenomenon of parametric down conversion from the vacuum may be\nunderstood as a process in classical electrodynamics, in which a nonlinear\ncrystal couples the modes of the pumping field with those of the zeropoint, or\n\"vacuum\" field. This is an entirely local theory of the phenomenon, in contrast\nwith the presently accepted nonlocal theory. The new theory predicts a hitherto\nunsuspected phenomenon - parametric up conversion from the vacuum.",
    "arxiv_id": "quant-ph/9711029",
    "authors": [
      "Trevor W. Marshall"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Do we need photons in parametric down conversion?",
    "url": "https://arxiv.org/abs/quant-ph/9711029"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9fc7afdc-b7ca-41fd-af3b-6d0c7edbe4eb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}