{
  "annotation_id": "cc89312c-6b41-4b7f-a44b-a5275cb52b18",
  "date_created": "2026-03-02T18:01:49.515000Z",
  "date_modified": "2026-03-02T18:01:49.515000Z",
  "file_hash": "a1971bec874aaf6cff35d2f25150246255324840c3ee7cc5d7153648ff64e814",
  "private": false,
  "record": {
    "abstract": "We introduce nonlinear canonical transformations that yield effective\nHamiltonians of multiphoton down conversion processes, and we define the\nassociated non-Gaussian multiphoton squeezed states as the coherent states of\nthe multiphoton Hamiltonians. We study in detail the four-photon processes and\nthe associated non-Gaussian four-photon squeezed states. The realization of\nsqueezing, the behavior of the field statistics, and the structure of the phase\nspace distributions show that these states realize a natural four-photon\ngeneralization of the two-photon squeezed states.",
    "arxiv_id": "quant-ph/0201124",
    "authors": [
      "Silvio De Siena",
      "Antonio Di Lisi",
      "Fabrizio Illuminati"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Hamiltonian models of multiphoton processes and four--photon squeezed   states via nonlinear canonical transformations",
    "url": "https://arxiv.org/abs/quant-ph/0201124"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "564b0300-0887-46fc-93f8-96de98716e6d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}