{
  "annotation_id": "7ac44dff-e6b0-49c9-a5f5-938b0021cf88",
  "date_created": "2026-03-02T18:02:20.595000Z",
  "date_modified": "2026-03-02T18:02:20.595000Z",
  "file_hash": "3544d1f9db1f67f6cc5afef83412df6d4b3dad1b08b4d2d286c9dc58cc2292b2",
  "private": false,
  "record": {
    "abstract": "We demonstrate a simple, robust, and ultrabright parametric down-conversion\nsource of polarization-entangled photons based on a polarization Sagnac\ninterferometer. Bidirectional pumping in type-II phase-matched periodically\npoled KTiOPO4 yields a measured flux of 5 000 polarization-entangled pairs/s\nper mW of pump power in a 1-nm bandwidth at 96.8% quantum-interference\nvisibility. The common-path arrangement of the Sagnac interferometer eliminates\nthe need for phase stabilization for the biphoton output state.",
    "arxiv_id": "quant-ph/0509219",
    "authors": [
      "Taehyun Kim",
      "Marco Fiorentino",
      "Franco N. C. Wong"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.012316",
    "title": "Phase-stable source of polarization-entangled photons using a   polarization Sagnac interferometer",
    "url": "https://arxiv.org/abs/quant-ph/0509219"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "085f685f-6491-43f5-bf53-4736e26722ae",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}