{
  "annotation_id": "fef68efd-3411-462a-a5cb-ecff79425877",
  "date_created": "2026-03-02T18:01:49.508000Z",
  "date_modified": "2026-03-02T18:01:49.508000Z",
  "file_hash": "44d895e07a1fdad4db0da4a60f198e9734fa5f6253c46d568a46b8180b780877",
  "private": false,
  "record": {
    "abstract": "We show how to create practical, efficient, quantum repeaters, employing\ndouble-photon guns, for long-distance optical quantum communication. The guns\ncreate polarization-entangled photon pairs on demand. One such source might be\na semiconducter quantum dot, which has the distinct advantage over parametric\ndown-conversion that the probability of creating a photon pair is close to one,\nwhile the probability of creating multiple pairs vanishes. The swapping and\npurifying components are implemented by polarizing beam splitters and\nprobabilistic optical CNOT gates.",
    "arxiv_id": "quant-ph/0203134",
    "authors": [
      "Pieter Kok",
      "Colin P. Williams",
      "Jonathan P. Dowling"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.022301",
    "journal_ref": "Phys. Rev. A 68, 022301 (2003).",
    "title": "Practical quantum repeaters with linear optics and double-photon guns",
    "url": "https://arxiv.org/abs/quant-ph/0203134"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7b22d322-a538-44bb-aec1-a8ab69317f88",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}