{
  "annotation_id": "229a8870-b87c-4baa-b1d7-1205147cf8e4",
  "date_created": "2026-03-02T18:01:46.207000Z",
  "date_modified": "2026-03-02T18:01:46.207000Z",
  "file_hash": "560fd27103c1980a73b0960587ab30df92b34011d2dcea864e685cb4299ba9a8",
  "private": false,
  "record": {
    "abstract": "A new ultra bright pulsed source of polarization entangled photons has been\nrealized using type-II phase matching in spontaneous parametric down conversion\nprocess in two cascaded crystals. The optical axes of the crystals are aligned\nin such a way that the extraordinarily (ordinarily) polarized cone from one\ncrystal overlaps with the ordinarily (extraordinarily) polarized cone from the\nsecond crystal. This spatial overlapping removes the association between the\npolarization and the output angle of the photons that exist in a single type-II\ndown conversion process. Hence, entanglement of photons originating from any\npoint on the output cones is possible if a suitable optical delay line is used.\nThis delay line is particularly simple and easy to implement.",
    "arxiv_id": "quant-ph/0106122",
    "authors": [
      "G. Bitton",
      "W. P. Grice",
      "J. Moreau",
      "L. Zhang"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.063805",
    "title": "Novel Cascaded Ultra Bright Pulsed Source of Polarization Entangled   Photons",
    "url": "https://arxiv.org/abs/quant-ph/0106122"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "22b352c6-48b5-4347-b647-ab3e56789960",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}