{
  "annotation_id": "8cda87aa-9c2e-44bc-86fc-d2890786d966",
  "date_created": "2026-03-02T18:02:27.704000Z",
  "date_modified": "2026-03-02T18:02:27.704000Z",
  "file_hash": "fefc84a154c90d514a5d902bd05a234f7be2d699539ad6111e7ba66f1b67880b",
  "private": false,
  "record": {
    "abstract": "We have generated a new type of biphoton state by cavity-enhanced\ndown-conversion in a type-II phase-matched, periodically-poled KTiOPO_4 (PPKTP)\ncrystal. By introducing a weak intracavity birefringence, the\npolarization-entangled output was modulated between the singlet and triplet\nstates according to the arrival-time difference of the signal and idler\nphotons. This cavity-enhanced biphoton source is spectrally bright, yielding a\nsingle-mode fiber-coupled coincidence rate of 0.7 pairs/s per mW of pump power\nper MHz of down-conversion bandwidth. Its novel biphoton behavior may be\nutilized in sensitive measurements of weak intracavity birefringence.",
    "arxiv_id": "quant-ph/0605093",
    "authors": [
      "Christopher E. Kuklewicz",
      "Franco N. C. Wong",
      "Jeffrey H. Shapiro"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.97.223601",
    "title": "Time-bin modulated polarization-entangled biphotons from cavity-enhanced   down-conversion",
    "url": "https://arxiv.org/abs/quant-ph/0605093"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d246f559-4309-4794-bfe5-91b1c15a623e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}