{
  "annotation_id": "2ccac975-a5c5-464b-b4b2-76f4322c2686",
  "date_created": "2026-03-02T18:02:02.726000Z",
  "date_modified": "2026-03-02T18:02:02.726000Z",
  "file_hash": "8740c442f379511f6cf6b7a24f739651d32934715229d5ed61a79f180df28a86",
  "private": false,
  "record": {
    "abstract": "The need for spatial and spectral filtering in the generation of polarization\nentanglement is eliminated by combining two coherently-driven type-II\nspontaneous parametric downconverters. The resulting ultrabright source emits\nphoton pairs that are polarization entangled over the entire spatial cone and\nspectrum of emission. We detect a flux of $\\sim$12 000 polarization-entangled\npairs/s per mW of pump power at 90% quantum-interference visibility, and the\nsource can be temperature tuned for 5 nm around frequency degeneracy. The\noutput state is actively controlled by precisely adjusting the relative phase\nof the two coherent pumps.",
    "arxiv_id": "quant-ph/0309071",
    "authors": [
      "Marco Fiorentino",
      "Gaetan Messin",
      "Christopher E. Kuklewicz",
      "Franco N. C. Wong",
      "Jeffrey H. Shapiro"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.041801",
    "title": "Generation of ultrabright tunable polarization entanglement without   spatial, spectral, or temporal constraints",
    "url": "https://arxiv.org/abs/quant-ph/0309071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0cb99fe0-2819-4175-9e3e-51196a26d373",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}